APA (7th ed.) Citation

Soule, G. (1968). Undersea frontiers: Exploring by deep-diving submarines. Rand McNally.

Chicago Style (17th ed.) Citation

Soule, Gardner. Undersea Frontiers: Exploring by Deep-diving Submarines. Chicago: Rand McNally, 1968.

MLA (9th ed.) Citation

Soule, Gardner. Undersea Frontiers: Exploring by Deep-diving Submarines. Rand McNally, 1968.

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