APA (7th ed.) Citation

Helm, T. (1963). Shark!: Unpredictable killer of the sea. Collier.

Chicago Style (17th ed.) Citation

Helm, Thomas. Shark!: Unpredictable Killer of the Sea. New York: Collier, 1963.

MLA (9th ed.) Citation

Helm, Thomas. Shark!: Unpredictable Killer of the Sea. Collier, 1963.

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