Griffiths, J. C. (1981). Afghanistan: Key to a continent. Westview Pr.
Chicago Style (17th ed.) ZitazioaGriffiths, John C. Afghanistan: Key to a Continent. Boulder, Colo.: Westview Pr, 1981.
MLA (9th ed.) ZitazioaGriffiths, John C. Afghanistan: Key to a Continent. Westview Pr, 1981.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.