Παραπομπή APA

Walls, C., & Breidenbach, R. (2005). Spring in action (2nd ed.). Dreamtech.

Παραπομπή Chicago Style

Walls, Craig, και Ryan Breidenbach. Spring in Action. 2nd ed. New Delhi: Dreamtech, 2005.

Παραπομπή MLA

Walls, Craig, και Ryan Breidenbach. Spring in Action. 2nd ed. Dreamtech, 2005.