Dyfyniad APA

Jacobs, W. J., Wilder, H. B., Ludlum, R. P., & Brown, H. M. (1988). America's story. Houghton Mifflin.

Dyfyniad Arddull Chicago

Jacobs, William Jay, Howard B. Wilder, Robert P. Ludlum, and Harriet McCune Brown. America's Story. Boston: Houghton Mifflin, 1988.

Dyfyniad MLA

Jacobs, William Jay, et al. America's Story. Houghton Mifflin, 1988.

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