Gaya APA

Grossenheider, W, H, B, ;, R, P. (1976). A field guide to the mammals of America North of Mexico . Boston: Houghton Mifflin Company Boston.

Gaya MLA

Grossenheider, William, Henry, Burt, ;, Richard, Philip. "A field guide to the mammals of America North of Mexico". Boston: Houghton Mifflin Company Boston, 1976. Text.