APA-referens (7:e uppl.)

Hagen, E. E. (1963). Planning economic development. Richard D. Irwin.

Chicago-referens (17:e uppl.)

Hagen, Everett E. Planning Economic Development. Homewood: Richard D. Irwin, 1963.

MLA-referens (9:e uppl.)

Hagen, Everett E. Planning Economic Development. Richard D. Irwin, 1963.