APA (7th ed.) Citation

WALKER, B. S. (1978). The Rocky mountains. Time Life Books.

Chicago Style (17th ed.) Citation

WALKER, Bryce S. The Rocky Mountains. Time Life Books, 1978.

MLA (8th ed.) Citation

WALKER, Bryce S. The Rocky Mountains. Time Life Books, 1978.

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