APA (7th ed.) Citation

Humble, R. (1980). The explorers. Time-Life Books.

Chicago Style (17th ed.) Citation

Humble, Richard. The Explorers. Amsterdam: Time-Life Books, 1980.

MLA (8th ed.) Citation

Humble, Richard. The Explorers. Time-Life Books, 1980.

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