APA-referens (7:e uppl.)

Snodgrass, M. M., & Wallace, L. T. (1980). Agriculture, economics, and resource management (2d ed.). Prentice-Hall.

Chicago-referens (17:e uppl.)

Snodgrass, Milton Moore, och Luther T. Wallace. Agriculture, Economics, and Resource Management. 2d ed. Englewood Cliffs, N.J.: Prentice-Hall, 1980.

MLA-referens (9:e uppl.)

Snodgrass, Milton Moore, och Luther T. Wallace. Agriculture, Economics, and Resource Management. 2d ed. Prentice-Hall, 1980.