Dyfyniad APA

(1963). Directory of special libraries and information centers. Gale Research.

Dyfyniad Arddull Chicago

Directory of Special Libraries and Information Centers. Detroit: Gale Research, 1963.

Dyfyniad MLA

Directory of Special Libraries and Information Centers. Gale Research, 1963.

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