De Belen, R. T. (2019). Research & thesis writing: Outcome-based research manual. Wiseman's Books Trading, Inc.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDe Belen, Rustico T. Research & Thesis Writing: Outcome-based Research Manual. Quezon City: Wiseman's Books Trading, Inc, 2019.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDe Belen, Rustico T. Research & Thesis Writing: Outcome-based Research Manual. Wiseman's Books Trading, Inc, 2019.
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