Wallace, B. J. (1967). Gaddang agriculture: The focus of ecological and cultural change.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWallace, Benny Joe. Gaddang Agriculture: The Focus of Ecological and Cultural Change. [Madison, Wisconsin], 1967.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWallace, Benny Joe. Gaddang Agriculture: The Focus of Ecological and Cultural Change. 1967.
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