Dyfyniad APA

Katz, W. A. (1969). Introduction to reference work: Reference services. New York: McGraw-Hill.

Dyfyniad Arddull Chicago

Katz, William A. Introduction to Reference Work: Reference Services. New York: McGraw-Hill, 1969.

Dyfyniad MLA

Katz, William A. Introduction to Reference Work: Reference Services. New York: McGraw-Hill, 1969.

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