Sissy, I did a check of your other postings and found you posted almost all in October/November of 2007.So, I'm assuming your relatively new to genealogy research, at least online?
What you need to do is start with the basics.Start with one family and identify everything you can at a level closest to today, or whatever timeframe that you can identify: their name, their date of birth, their siblings, their spouse, their children, and where events took place, where born, where married, where died, etc.
Then, when you post an inquiry, give what information that you have about them for a researcher.There are a LOT of different methods researchers can find information.Some use Ancestry.com for the US Census, and other dozens/hundreds of databases.Some use other state databases systems.Some of us use a variety of anything we can find to find people.
For James F. and Opal E. White.I'm guessing she was born Mills, based on your other postings?If so, her name should be listed as "Opal E (Mills) White".That would show her maiden name (nee:).Do you know when and where she was born, when James was born?There are dozens/hundreds of James White.Do you know where they died?Do you have their obituaries?That information would help in finding them.
I found:Opal E. White died 13 June 1960 in Multnomah County, OR, spouse James. From another of your posts, Opal E. Mills was born 1901 in Oklahoma.Is this correct?So this person was only 58 or 59 when she died?
Did she have any children?If she had family, it is more likely that there is an obituary.A good number of obituaries identify where a person is buried.Or, it identifies the name of the funeral home that handled her arrangements.That funeral home would have records of where they were buried.If she has children that you know their names, they might be found.But, we would need some information as to who they are.If you only know, "David White", it would be impossible to find.
So, provide whatever information you have and someone would try to help.
I wouldn't even bother trying the cemetery websites given by that other person.Most cemeteries haven't been transcribed to show all the people that are within them.AND, if you looked at all the Clackamas County cemeteries, you might later learn that they were buried in Multnomah County, not Clackamas.
I'm not family, I just try to help people learn about genealogy and to help where they have been misled.