Cita APA (7a ed.)

(1993). Holdings of Research Libraries in U.S. and Canada, 1991-92.

Cita Chicago Style (17a ed.)

Holdings of Research Libraries in U.S. and Canada, 1991-92. 1993.

Cita MLA (9a ed.)

Holdings of Research Libraries in U.S. and Canada, 1991-92. 1993.