APA (7th ed.) Citation

Blessing, G. F., & Darling, L. A. (1912). Elements of drawing. J. Wiley & sons; [etc., etc.].

Chicago Style (17th ed.) Citation

Blessing, George F., and Lewis A. Darling. Elements of Drawing. New York: J. Wiley & sons; [etc., etc.], 1912.

MLA (9th ed.) Citation

Blessing, George F., and Lewis A. Darling. Elements of Drawing. J. Wiley & sons; [etc., etc.], 1912.