APA (7th ed.) Citation

Smith, W., & Bührer, E. M. (1975). Flags through the ages and across the world. McGraw-Hill.

Chicago Style (17th ed.) Citation

Smith, Whitney, and Emil M. Bührer. Flags Through the Ages and Across the World. New York [etc.]: McGraw-Hill, 1975.

MLA (9th ed.) Citation

Smith, Whitney, and Emil M. Bührer. Flags Through the Ages and Across the World. McGraw-Hill, 1975.