APA Citation

(1958). Postal zone directory, Philadelphia, Pa (1958.). Washington, D.C.: U.S. Post Office Dept..

Chicago Style Citation

Postal Zone Directory, Philadelphia, Pa. 1958. Washington, D.C.: U.S. Post Office Dept., 1958.

MLA Citation

Postal Zone Directory, Philadelphia, Pa. 1958. Washington, D.C.: U.S. Post Office Dept., 1958.

Warning: These citations may not always be 100% accurate.