APA (7th ed.) Citation

Niekerk, G. (1986). The effect of temperature and humidity on respirator fit. [publisher not identified].

Chicago Style (17th ed.) Citation

Niekerk, Gary. The Effect of Temperature and Humidity on Respirator Fit. [Place of publication not identified]: [publisher not identified], 1986.

MLA (9th ed.) Citation

Niekerk, Gary. The Effect of Temperature and Humidity on Respirator Fit. [publisher not identified], 1986.