APA (7 वां संस्करण) प्रशस्ति पत्र

Gamboa, R. B. Oil industry is a free market. IN Business Leisure. The Philippine Star.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Gamboa, Ray Butch. "Oil Industry Is a Free Market. IN Business Leisure." The Philippine Star .

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Gamboa, Ray Butch. "Oil Industry Is a Free Market. IN Business Leisure." The Philippine Star, .