Style de citation APA (7e éd.)

Over, W. H. (1923). Trees and shrubs of South Dakota. Pub. by the University.

Style de citation Chicago (17e éd.)

Over, William H. Trees and Shrubs of South Dakota. Vermillion, S.D.: Pub. by the University, 1923.

Style de citation MLA (8e éd.)

Over, William H. Trees and Shrubs of South Dakota. Pub. by the University, 1923.