APA (7th ed.) Citation

Partch, L. E., & Bridge, T. E. (1951). Methods of making piping flexibility analyses. Heating/Piping/Air Conditioning., 23, 136.

Chicago Style (17th ed.) Citation

Partch, L. E., and T. E. Bridge. "Methods of Making Piping Flexibility Analyses." Heating/Piping/Air Conditioning. 23 (1951): 136.

MLA (9th ed.) Citation

Partch, L. E., and T. E. Bridge. "Methods of Making Piping Flexibility Analyses." Heating/Piping/Air Conditioning., vol. 23, 1951, p. 136.