Cita APA (7th ed.)

Gray, J., & Dahmen, D. (1977). Market potential for Wisconsin's attraction and campgrounds (2nd ed.). Recreation Resources Ceter.

Cita Chicago (17th ed.)

Gray, Jack, i Dave Dahmen. Market Potential for Wisconsin's Attraction and Campgrounds. 2nd ed. Madison, Wisc: Recreation Resources Ceter, 1977.

Cita MLA (9th ed.)

Gray, Jack, i Dave Dahmen. Market Potential for Wisconsin's Attraction and Campgrounds. 2nd ed. Recreation Resources Ceter, 1977.