APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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