APA (7th ed.) Citation

Hedberg Maps, Inc, Case, N., & Marietta, D. (2004). Professor Pathfinder's colleges and universities of the United States. Hedberg Maps.

Chicago Style (17th ed.) Citation

Hedberg Maps, Inc, Nat Case, and Don Marietta. Professor Pathfinder's Colleges and Universities of the United States. Minneapolis, MN: Hedberg Maps, 2004.

MLA (9th ed.) Citation

Hedberg Maps, Inc, et al. Professor Pathfinder's Colleges and Universities of the United States. Hedberg Maps, 2004.