APA (7th ed.) Citation

Barlow, R. D. (2007). Three decades of pros worth knowing. Healthcare Purchasing News, 31(7), 12.

Chicago Style (17th ed.) Citation

Barlow, Rick Dana. "Three Decades of Pros Worth Knowing." Healthcare Purchasing News 31, no. 7 (2007): 12.

MLA (9th ed.) Citation

Barlow, Rick Dana. "Three Decades of Pros Worth Knowing." Healthcare Purchasing News, vol. 31, no. 7, 2007, p. 12.