APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Katz, William A. Opportunities for Reference Services: The Bright Side of Reference Services in the 1990's. New York [u.a.]: Haworth Press, 1991.

MLA (9th ed.) Citation

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