APA (7th ed.) Citation

McKinley, A. E., Howland, A. C., & Dann, M. L. (1939). World history today. American Book Co..

Chicago Style (17th ed.) Citation

McKinley, Albert E., Arthur C. Howland, and Matthew Lincoln Dann. World History Today. New York ; Cincinnati [etc.]: American Book Co., 1939.

MLA (8th ed.) Citation

McKinley, Albert E., et al. World History Today. American Book Co., 1939.