Cita APA

(1981). Directory of special libraries and information centers: A guide to special libraries, research libraries ... (6. edition.). Detroit, Mich.: Gale Research.

Citación estilo Chicago

Directory of Special Libraries and Information Centers: A Guide to Special Libraries, Research Libraries ... 6. edition. Detroit, Mich.: Gale Research, 1981.

Cita MLA

Directory of Special Libraries and Information Centers: A Guide to Special Libraries, Research Libraries ... 6. edition. Detroit, Mich.: Gale Research, 1981.