APA (7th ed.) Citation

Partch, L. E. (1953). Calculating flexibility for straight line piping elements. Heating/Piping/Air Conditioning., 25, 74.

Chicago Style (17th ed.) Citation

Partch, L. E. "Calculating Flexibility for Straight Line Piping Elements." Heating/Piping/Air Conditioning. 25 (1953): 74.

MLA (9th ed.) Citation

Partch, L. E. "Calculating Flexibility for Straight Line Piping Elements." Heating/Piping/Air Conditioning., vol. 25, 1953, p. 74.