APA (7th ed.) Citation

Heuvelmans, B. (1958). On the tracks of unknown animals. R. Hart-Davis.

Chicago Style (17th ed.) Citation

Heuvelmans, Bernard. On the Tracks of Unknown Animals. London: R. Hart-Davis, 1958.

MLA (9th ed.) Citation

Heuvelmans, Bernard. On the Tracks of Unknown Animals. R. Hart-Davis, 1958.

Warning: These citations may not always be 100% accurate.