Παραπομπή σε μορφή APA (7η εκδ.)

Gredley, E., & Hopkinson, A. (1990). Exchanging bibliographic data: MARC and other international formats. Canadian Library Association Library Association American Library Association.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Gredley, Ellen, και Alan Hopkinson. Exchanging Bibliographic Data: MARC and Other International Formats. Ottawa London Chicago: Canadian Library Association Library Association American Library Association, 1990.

Παραπομπή σε μορφή MLA (8th εκδ.)

Gredley, Ellen, και Alan Hopkinson. Exchanging Bibliographic Data: MARC and Other International Formats. Canadian Library Association Library Association American Library Association, 1990.