Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (8th εκδ.)

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