APA (7th ed.) Citation

Sportsman's County Map Service & Phelps, L. R. (1950). Houghton County. Sportsman's County Map Service.

Chicago Style (17th ed.) Citation

Sportsman's County Map Service and Lee R. Phelps. Houghton County. Detroit, Mich.: Sportsman's County Map Service, 1950.

MLA (9th ed.) Citation

Sportsman's County Map Service and Lee R. Phelps. Houghton County. Sportsman's County Map Service, 1950.