Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.