(1996). Thursday Evening Concert Series (Douglas Back, classical guitarist & lutenist). UP College of Music.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रThursday Evening Concert Series (Douglas Back, Classical Guitarist & Lutenist). Quezon, City: UP College of Music, 1996.
एमएलए (9वां संस्करण) प्रशस्ति पत्रThursday Evening Concert Series (Douglas Back, Classical Guitarist & Lutenist). UP College of Music, 1996.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.