Cita APA

Katz, W. A. 1. (1991). Opportunities for reference services: The bright side of reference services in the 1990's. New York: Haworth Press.

Citación estilo Chicago

Katz, William A. 1924-2004. Opportunities for Reference Services: The Bright Side of Reference Services in the 1990's. New York: Haworth Press, 1991.

Cita MLA

Katz, William A. 1924-2004. Opportunities for Reference Services: The Bright Side of Reference Services in the 1990's. New York: Haworth Press, 1991.