APA (7th ed.) Citation

Humble, R. (1979). The explorers. The seafarers. Time-Life Books.

Chicago Style (17th ed.) Citation

Humble, Richard. The Explorers. The Seafarers. Virginia: Time-Life Books, 1979.

MLA (9th ed.) Citation

Humble, Richard. The Explorers. The Seafarers. Time-Life Books, 1979.

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