APA (7th ed.) Citation

Gaskell, T. F. (1960). Under the deep oceans: Twentieth century voyages of discovery. Norton.

Chicago Style (17th ed.) Citation

Gaskell, Thomas Frohock. Under the Deep Oceans: Twentieth Century Voyages of Discovery. New York: Norton, 1960.

MLA (9th ed.) Citation

Gaskell, Thomas Frohock. Under the Deep Oceans: Twentieth Century Voyages of Discovery. Norton, 1960.