APA (7th ed.) Citation

Oman, C. (1970). Warwick, the kingmaker. Books for Libraries Press.

Chicago Style (17th ed.) Citation

Oman, Charles. Warwick, the Kingmaker. Freeport, N.Y.: Books for Libraries Press, 1970.

MLA (9th ed.) Citation

Oman, Charles. Warwick, the Kingmaker. Books for Libraries Press, 1970.

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