APA način citiranja (7. izdanje)

United States. Post Office Dept. (1968). National Zip code directory. [Bureau of Operation.

Čikaški stil citiranja (17. izdanje)

United States. Post Office Dept. National Zip Code Directory. Washington: [Bureau of Operation, 1968.

MLA način citiranja (9. izdanje)

United States. Post Office Dept. National Zip Code Directory. [Bureau of Operation, 1968.