APA (7th ed.) Citation

COKER, A. K. (1993). Program calculates Z-factor for natural gas. The Oil & gas journal, 91(7), 74-75.

Chicago Style (17th ed.) Citation

COKER, A. K. "Program Calculates Z-factor for Natural Gas." The Oil & Gas Journal 91, no. 7 (1993): 74-75.

MLA (9th ed.) Citation

COKER, A. K. "Program Calculates Z-factor for Natural Gas." The Oil & Gas Journal, vol. 91, no. 7, 1993, pp. 74-75.