APA (7th ed.) Citation

Preimesberger, C. (2007). OSIsoft upgrades PI System. eWeek, 24(1), 28.

Chicago Style (17th ed.) Citation

Preimesberger, Chris. "OSIsoft Upgrades PI System." EWeek 24, no. 1 (2007): 28.

MLA (9th ed.) Citation

Preimesberger, Chris. "OSIsoft Upgrades PI System." EWeek, vol. 24, no. 1, 2007, p. 28.