Echeminada, P. (1998). M'danao tribesmen don't need viagra. Philippine Star.
Chicago-čujuhus (17. p.)Echeminada, Perseus. "M'danao Tribesmen Don't Need Viagra." Philippine Star 1998.
MLA-čujuhus (9. p.)Echeminada, Perseus. "M'danao Tribesmen Don't Need Viagra." Philippine Star, 1998.
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