(1990). Helen Vela special on abortion entitled 'Tunaw na Manyika' today. Philippines Journal.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र"Helen Vela Special on Abortion Entitled 'Tunaw Na Manyika' Today." Philippines Journal 1990.
एमएलए (9वां संस्करण) प्रशस्ति पत्र"Helen Vela Special on Abortion Entitled 'Tunaw Na Manyika' Today." Philippines Journal, 1990.
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