Dyfyniad APA

Winchell, C. M. (1967). Guide to reference books (8th ed.). American Library Association.

Dyfyniad Arddull Chicago

Winchell, Constance Mabel. Guide to Reference Books. 8th ed. Chicago: American Library Association, 1967.

Dyfyniad MLA

Winchell, Constance Mabel. Guide to Reference Books. 8th ed. American Library Association, 1967.

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