Gibb, A. (1976). A "dual modern economics" growth model [microfilm]. Photoduplication Service,University of the Philippines Library.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGibb, Arthur,Jr. A "Dual Modern Economics" Growth Model [microfilm]. Quezon City: Photoduplication Service,University of the Philippines Library, 1976.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGibb, Arthur,Jr. A "Dual Modern Economics" Growth Model [microfilm]. Photoduplication Service,University of the Philippines Library, 1976.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.