Dyfyniad APA

Cheney, F. N., & Williams, W. J. (1980). Fundamental reference sources (2d ed.). American Library Association.

Dyfyniad Arddull Chicago

Cheney, Frances Neel, and Wiley J. Williams. Fundamental Reference Sources. 2d ed. Chicago: American Library Association, 1980.

Dyfyniad MLA

Cheney, Frances Neel, and Wiley J. Williams. Fundamental Reference Sources. 2d ed. American Library Association, 1980.

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