APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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