APA (7th ed.) Citation

Mathur, G. D. (1993). Retrofitting heat-recovery systems with evaporative coolers. Heating/Piping/Air Conditioning., 65, 47.

Chicago Style (17th ed.) Citation

Mathur, G. D. "Retrofitting Heat-recovery Systems with Evaporative Coolers." Heating/Piping/Air Conditioning. 65 (1993): 47.

MLA (9th ed.) Citation

Mathur, G. D. "Retrofitting Heat-recovery Systems with Evaporative Coolers." Heating/Piping/Air Conditioning., vol. 65, 1993, p. 47.