Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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