APA (7th ed.) Citation

CACI, Inc. - Federal. (1991). The Sourcebook of zip code demographics (10th ed.). CACI Marketing Systems.

Chicago Style (17th ed.) Citation

CACI, Inc. - Federal. The Sourcebook of Zip Code Demographics. 10th ed. Arlington, VA: CACI Marketing Systems, 1991.

MLA (9th ed.) Citation

CACI, Inc. - Federal. The Sourcebook of Zip Code Demographics. 10th ed. CACI Marketing Systems, 1991.