APA stil citiranja

Protić, R. (2001). Natural gas cooling saves electricity and reduces environmental pollution: Natural gas cooling saves electricity and reduces environmental pollution. Nafta (Zagreb), p. 2.

Chicago stil citiranja

Protić, Radmilo. "Natural gas cooling saves electricity and reduces environmental pollution: Natural gas cooling saves electricity and reduces environmental pollution." 2001: 2.

MLA stil citiranja

Protić, Radmilo. "Natural gas cooling saves electricity and reduces environmental pollution: Natural gas cooling saves electricity and reduces environmental pollution." 2001: 2.