Dyfyniad APA

Hirshberg, H. S. (1942). Subject guide to reference books. American Library Association.

Dyfyniad Arddull Chicago

Hirshberg, Herbert S. Subject Guide to Reference Books. Chicago: American Library Association, 1942.

Dyfyniad MLA

Hirshberg, Herbert S. Subject Guide to Reference Books. American Library Association, 1942.

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