APA (7th ed.) Citation

Spring, T. (2007). Phone Bill Woes. PCWorld, 25(4), 18.

Chicago Style (17th ed.) Citation

Spring, Tom. "Phone Bill Woes." PCWorld 25, no. 4 (2007): 18.

MLA (9th ed.) Citation

Spring, Tom. "Phone Bill Woes." PCWorld, vol. 25, no. 4, 2007, p. 18.