Dyfyniad APA

(1979). Books in print: An author-title-series index to the publishers'trade list annual, eng.

Dyfyniad Arddull Chicago

Books in Print: An Author-title-series Index to the Publishers'trade List Annual, Eng. 1979.

Dyfyniad MLA

Books in Print: An Author-title-series Index to the Publishers'trade List Annual, Eng. 1979.

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