APA (7th ed.) Citation

Keller, C. A. (2006). Collection Development: Electronic or Print Subscription Resources? School Library Media Activities Monthly, 22(9), 56.

Chicago Style (17th ed.) Citation

Keller, Cynthia A. "Collection Development: Electronic or Print Subscription Resources?" School Library Media Activities Monthly 22, no. 9 (2006): 56.

MLA (9th ed.) Citation

Keller, Cynthia A. "Collection Development: Electronic or Print Subscription Resources?" School Library Media Activities Monthly, vol. 22, no. 9, 2006, p. 56.