APA (7th ed.) Citation

Ladd, H. S. (1972). Cenozoic fossil mollusks from western Pacific Islands: Gastropods (Turritellidae through Strombidae). United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Ladd, Harry S. Cenozoic Fossil Mollusks from Western Pacific Islands: Gastropods (Turritellidae Through Strombidae). Washington: United States Department of the Interior, Geological Survey, 1972.

MLA (9th ed.) Citation

Ladd, Harry S. Cenozoic Fossil Mollusks from Western Pacific Islands: Gastropods (Turritellidae Through Strombidae). United States Department of the Interior, Geological Survey, 1972.