APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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