Cain, A. J. (1954). Animal species and their evolution. Hutchinson's University Library.
Chicago-referens (17:e uppl.)Cain, Arthur J. Animal Species and Their Evolution. London: Hutchinson's University Library, 1954.
MLA-referens (9:e uppl.)Cain, Arthur J. Animal Species and Their Evolution. Hutchinson's University Library, 1954.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.