(1987). A Concert of Contemporary Music featuring the works of (Ryan Cayabyab & Verne de la Peña). UP College of Music.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रA Concert of Contemporary Music Featuring the Works of (Ryan Cayabyab & Verne De La Peña). Quezon City: UP College of Music, 1987.
एमएलए (9वां संस्करण) प्रशस्ति पत्रA Concert of Contemporary Music Featuring the Works of (Ryan Cayabyab & Verne De La Peña). UP College of Music, 1987.
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