Dyfyniad APA

O'Brien, R., & Soderman, J. (1975). The Basic guide to research sources. New American Library.

Dyfyniad Arddull Chicago

O'Brien, Robert, and Joanne Soderman. The Basic Guide to Research Sources. New York: New American Library, 1975.

Dyfyniad MLA

O'Brien, Robert, and Joanne Soderman. The Basic Guide to Research Sources. New American Library, 1975.

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