Van Pelt, R. (1996). Champion trees of Washington State ([4th ed.].). Washington State Big Tree Program in association with University of Washington Press.
Style de citation Chicago (17e éd.)Van Pelt, Robert. Champion Trees of Washington State. [4th ed.]. Seattle: Washington State Big Tree Program in association with University of Washington Press, 1996.
Style de citation MLA (8e éd.)Van Pelt, Robert. Champion Trees of Washington State. [4th ed.]. Washington State Big Tree Program in association with University of Washington Press, 1996.
Attention : ces citations peuvent ne pas être correctes à 100%.