Mercurio, P. G. (1986). O.P.M: An editorial campaign for the advancement of original pilipino music.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMercurio, Policarpo G. O.P.M: An Editorial Campaign for the Advancement of Original Pilipino Music. 1986.
एमएलए (9वां संस्करण) प्रशस्ति पत्रMercurio, Policarpo G. O.P.M: An Editorial Campaign for the Advancement of Original Pilipino Music. 1986.
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