Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

Gredley, Ellen, y A. Hopkinson. Exchanging Bibliographic Data: MARC and Other International Formats. Canadian Library Association ; Library Association ; American Library Association, 1990.