Deismireacht APA

Helm, T. (1961). Shark!: Unpredictable killer of the sea. New York, N.Y.: Collier Books.

Trích dẫn kiểu Chicago

Helm, Thomas. Shark!: Unpredictable Killer of the Sea. New York, N.Y.: Collier Books, 1961.

Deismireacht MLA

Helm, Thomas. Shark!: Unpredictable Killer of the Sea. New York, N.Y.: Collier Books, 1961.

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