Dyfyniad APA

Bell, M. V., Bacon, J. C., & Hepler, J. C. (1957). Poole's index: Date and volume key. Association of College and Reference Libraries.

Dyfyniad Arddull Chicago

Bell, Marion V., Jean C. Bacon, and John C. Hepler. Poole's Index: Date and Volume Key. Chicago: Association of College and Reference Libraries, 1957.

Dyfyniad MLA

Bell, Marion V., et al. Poole's Index: Date and Volume Key. Association of College and Reference Libraries, 1957.

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