APA (7th ed.) Zitazioa
Waal, S. d. (1978). The Squamata <reptilia> of the Orange Free State, South Africa. Nasionale Museum.
Chicago Style (17th ed.) Zitazioa
Waal, S.W.P. de. The Squamata <reptilia> of the Orange Free State, South Africa. Bloemfontein: Nasionale Museum, 1978.
MLA (9th ed.) Zitazioa
Waal, S.W.P. de. The Squamata <reptilia> of the Orange Free State, South Africa. Nasionale Museum, 1978.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.