Nellis, J. G., & Parker, D. (1996). The essence of the economy (2nd ed.). Prentice Hall.
Chicago Style aipamenaNellis, J. G., and David Parker. The Essence of the Economy. 2nd ed. London: Prentice Hall, 1996.
MLA aipamenaNellis, J. G., and David Parker. The Essence of the Economy. 2nd ed. Prentice Hall, 1996.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.