Washington (State). Department of Natural Resources & Washington Natural Heritage Program. (1983). State of Washington natural heritage plan. Washington Natural Heritage Program.
Style de citation Chicago (17e éd.)Washington (State). Department of Natural Resources et Washington Natural Heritage Program. State of Washington Natural Heritage Plan. [Olympia, WA]: Washington Natural Heritage Program, 1983.
Style de citation MLA (8e éd.)Washington (State). Department of Natural Resources et Washington Natural Heritage Program. State of Washington Natural Heritage Plan. Washington Natural Heritage Program, 1983.
Attention : ces citations peuvent ne pas être correctes à 100%.