APA-referens (7:e uppl.)

Hanley, N., Shaw, W. D., & Wright, R. E. The new economics of outdoor recreation.

Chicago-referens (17:e uppl.)

Hanley, Nick, W. Douglass Shaw, och Robert E. Wright. The New Economics of Outdoor Recreation.

MLA-referens (9:e uppl.)

Hanley, Nick, et al. The New Economics of Outdoor Recreation.