APA (7th ed.) Citation

WALKER, S. (2014). THE PUMP MAKER'S PERSPECTIVE. Coal Age, 119(7), 48.

Chicago Style (17th ed.) Citation

WALKER, SIMON. "THE PUMP MAKER'S PERSPECTIVE." Coal Age 119, no. 7 (2014): 48.

MLA (9th ed.) Citation

WALKER, SIMON. "THE PUMP MAKER'S PERSPECTIVE." Coal Age, vol. 119, no. 7, 2014, p. 48.