Calica, M. A. L. (2000). US to Sayyaf: No deal : Washington demands hostage's immediate unconditional release. Philippine Star.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCalica, Ma. Aurea L. "US to Sayyaf: No Deal : Washington Demands Hostage's Immediate Unconditional Release." Philippine Star 2000.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCalica, Ma. Aurea L. "US to Sayyaf: No Deal : Washington Demands Hostage's Immediate Unconditional Release." Philippine Star, 2000.
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