Philippines (Republic) Dept. of Tourism & Philippines (Republic). Department of Tourism. Tourism: Four-year development plan, 1974 to 1977. [s.n.
Chicagoスタイル(17版)引用形式Philippines (Republic) Dept. of Tourism , Philippines (Republic). Department of Tourism. Tourism: Four-year Development Plan, 1974 to 1977. Manila: [s.n.
MLA(9版)引用形式Philippines (Republic) Dept. of Tourism , Philippines (Republic). Department of Tourism. Tourism: Four-year Development Plan, 1974 to 1977. [s.n.
警告: この引用は必ずしも正確ではありません.