APA (7th ed.) Citation

Gruber, F. (1970). Zane Grey: A biography. World Pub. Co.

Chicago Style (17th ed.) Citation

Gruber, Frank. Zane Grey: A Biography. New York: World Pub. Co, 1970.

MLA (9th ed.) Citation

Gruber, Frank. Zane Grey: A Biography. World Pub. Co, 1970.