APA-referens (7:e uppl.)

Putt, A. D., & Springer, J. F. (1989). Policy research: Concepts, methods and applications. Prentice Hall.

Chicago-referens (17:e uppl.)

Putt, Allen D., och J. Fred Springer. Policy Research: Concepts, Methods and Applications. Englewood Cliffs, N.Y: Prentice Hall, 1989.

MLA-referens (9:e uppl.)

Putt, Allen D., och J. Fred Springer. Policy Research: Concepts, Methods and Applications. Prentice Hall, 1989.