Cita APA

Bowker. (1977). Publishers'international directory (7. ed.). New York: R. R. Bowker.

Citación estilo Chicago

Bowker. Publishers'international Directory. 7. ed. New York: R. R. Bowker, 1977.

Cita MLA

Bowker. Publishers'international Directory. 7. ed. New York: R. R. Bowker, 1977.