APA (7e ed.) Bronvermelding

Calica, M. A. L. (2000). US to Sayyaf: No deal : Washington demands hostage's immediate unconditional release. Philippine Star.

Chicago (17e ed.) Bronvermelding

Calica, Ma. Aurea L. "US to Sayyaf: No Deal : Washington Demands Hostage's Immediate Unconditional Release." Philippine Star 2000.

MLA (9e ed.) Bronvermelding

Calica, Ma. Aurea L. "US to Sayyaf: No Deal : Washington Demands Hostage's Immediate Unconditional Release." Philippine Star, 2000.