APA (7th ed.) Citation

RH, P. (1973). Letters to the editor. Anesthesia progress, 20(5), 140.3.

Chicago Style (17th ed.) Citation

RH, Propper. "Letters to the Editor." Anesthesia Progress 20, no. 5 (1973): 140.3.

MLA (9th ed.) Citation

RH, Propper. "Letters to the Editor." Anesthesia Progress, vol. 20, no. 5, 1973, p. 140.3.