Manapat, R. (1990). Wrong number: The PLDT telephone monopoly. s.n.
Chicagoスタイル(17版)引用形式Manapat, Ricardo. Wrong Number: The PLDT Telephone Monopoly. [S.l: s.n, 1990.
MLA(9版)引用形式Manapat, Ricardo. Wrong Number: The PLDT Telephone Monopoly. s.n, 1990.
警告: この引用は必ずしも正確ではありません.