Steward, A. N. (1960). Aquatic plants of the Pacific Northwest: With vegetative keys. Oregon State College.
Style de citation Chicago (17e éd.)Steward, Albert Newton. Aquatic Plants of the Pacific Northwest: With Vegetative Keys. Corvallis: Oregon State College, 1960.
Style de citation MLA (8e éd.)Steward, Albert Newton. Aquatic Plants of the Pacific Northwest: With Vegetative Keys. Oregon State College, 1960.
Attention : ces citations peuvent ne pas être correctes à 100%.