Gutierrez, E. (1998). The race in N. Mindanao: Machinery vs. popularity. Manila Times.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGutierrez, Eric. "The Race in N. Mindanao: Machinery Vs. Popularity." Manila Times 1998.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGutierrez, Eric. "The Race in N. Mindanao: Machinery Vs. Popularity." Manila Times, 1998.
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