De Villa, J. G. (1988). Philippine vacations & explorations. Devcon IP.
Chicagoスタイル(17版)引用形式De Villa, Jill Gale. Philippine Vacations & Explorations. Makati, Metro, Manila, Philippines: Devcon IP, 1988.
MLA(9版)引用形式De Villa, Jill Gale. Philippine Vacations & Explorations. Devcon IP, 1988.
警告: この引用は必ずしも正確ではありません.