De Guzman, J. A. (1991). Vital choices. Philippine Collegian.
Chicagoスタイル(17版)引用形式De Guzman, Joseph Angelo. "Vital Choices." Philippine Collegian 1991.
MLA(9版)引用形式De Guzman, Joseph Angelo. "Vital Choices." Philippine Collegian, 1991.
警告: この引用は必ずしも正確ではありません.