Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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