De Guzman, G. (2008). Harder times ahead. Philippines Free Press.
Chicagoスタイル(17版)引用形式De Guzman, Guiller. "Harder Times Ahead." Philippines Free Press 2008.
MLA(9版)引用形式De Guzman, Guiller. "Harder Times Ahead." Philippines Free Press, 2008.
警告: この引用は必ずしも正確ではありません.