APA (7th ed.) Citation

Petrides, G. A., & Petrides, O. (1998). Trees of the Pacific Northwest: Including all trees that grow wild in Oregon, Washington, Idaho, Montana, British Columbia, W. Alberta, Yukon, and Alaska : a new and simple way to identify and enjoy some of the world's most beautiful and impressive forest trees. Explorer Press.

Chicago Style (17th ed.) Citation

Petrides, George A., and Olivia Petrides. Trees of the Pacific Northwest: Including All Trees That Grow Wild in Oregon, Washington, Idaho, Montana, British Columbia, W. Alberta, Yukon, and Alaska : A New and Simple Way to Identify and Enjoy Some of the World's Most Beautiful and Impressive Forest Trees. Williamston, Mich.: Explorer Press, 1998.

MLA (9th ed.) Citation

Petrides, George A., and Olivia Petrides. Trees of the Pacific Northwest: Including All Trees That Grow Wild in Oregon, Washington, Idaho, Montana, British Columbia, W. Alberta, Yukon, and Alaska : A New and Simple Way to Identify and Enjoy Some of the World's Most Beautiful and Impressive Forest Trees. Explorer Press, 1998.