De Guzman, G. (2011). Opening moves. Philippines Free Press.
Chicagoスタイル(17版)引用形式De Guzman, Guiller. "Opening Moves." Philippines Free Press 2011.
MLA(9版)引用形式De Guzman, Guiller. "Opening Moves." Philippines Free Press, 2011.
警告: この引用は必ずしも正確ではありません.