APA (7th ed.) Zitazioa
Shaeffer, S., & Nkinyangi, J. A. (1983). Educational research environments in the developing world.
Chicago Style (17th ed.) Zitazioa
Shaeffer, Sheldon, eta John A. Nkinyangi. Educational Research Environments in the Developing World. 1983.
MLA (9th ed.) Zitazioa
Shaeffer, Sheldon, eta John A. Nkinyangi. Educational Research Environments in the Developing World. 1983.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.