APA (7th ed.) Citation

Warfel, H. E., & Manacop, P. R. (1950). Otter trawl explorations in Philippine waters. U.S. G.P.O..

Chicago Style (17th ed.) Citation

Warfel, Herbert Elmer, and Porfirio R. Manacop. Otter Trawl Explorations in Philippine Waters. Washington: U.S. G.P.O., 1950.

MLA (9th ed.) Citation

Warfel, Herbert Elmer, and Porfirio R. Manacop. Otter Trawl Explorations in Philippine Waters. U.S. G.P.O., 1950.