APA (7th ed.) Zitazioa

Heuvelmans, B. (1959). On the track of unknown animals. Hill and Wang.

Chicago Style (17th ed.) Zitazioa

Heuvelmans, Bernard. On the Track of Unknown Animals. Nueva York: Hill and Wang, 1959.

MLA (9th ed.) Zitazioa

Heuvelmans, Bernard. On the Track of Unknown Animals. Hill and Wang, 1959.