Citazione Stile APA (7a Edizione)

Philippine Telephone & Telegraph Co. (1943). Manila Telephone directory. [publisher not identified].

Citazione stile Chigago Style (17a edizione)

Philippine Telephone & Telegraph Co. Manila Telephone Directory. [place of publication not identified]: [publisher not identified], 1943.

Citatione MLA (9a ed.)

Philippine Telephone & Telegraph Co. Manila Telephone Directory. [publisher not identified], 1943.