Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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