CONCERN, Inc. (Consultancy, Organization, Communications, Education & Research Network). (1992). Sangguniang kabataan: Primer. Mary Jo Educational Supply.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCONCERN, Inc. (Consultancy, Organization, Communications, Education & Research Network). Sangguniang Kabataan: Primer. Manila: Mary Jo Educational Supply, 1992.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCONCERN, Inc. (Consultancy, Organization, Communications, Education & Research Network). Sangguniang Kabataan: Primer. Mary Jo Educational Supply, 1992.
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