Helbling, J., & Schult, V. (2004). Mangyan survival strategies. New Day.
Chicagoスタイル(17版)引用形式Helbling, Jurg, , Volker Schult. Mangyan Survival Strategies. Quezon City: New Day, 2004.
MLA(9版)引用形式Helbling, Jurg, , Volker Schult. Mangyan Survival Strategies. New Day, 2004.
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