Cita APA

Gale Research Inc. (1993). Gale directory of databases. Gale Research.

Citación estilo Chicago

Gale Research Inc. Gale Directory of Databases. Detroit (Gale Research, Inc., 835 Penobscot Bldg., Detroit, MI 48226): Gale Research, 1993.

Cita MLA

Gale Research Inc. Gale Directory of Databases. Gale Research, 1993.