APA (7th ed.) Citation

Ardrey, R. H., & Sketchley, B. (1999). Conoco cuts spiraling data storage/back-up costs. World Oil, 220(6), 61.

Chicago Style (17th ed.) Citation

Ardrey, R. Holt, and Bruce Sketchley. "Conoco Cuts Spiraling Data Storage/back-up Costs." World Oil 220, no. 6 (1999): 61.

MLA (9th ed.) Citation

Ardrey, R. Holt, and Bruce Sketchley. "Conoco Cuts Spiraling Data Storage/back-up Costs." World Oil, vol. 220, no. 6, 1999, p. 61.