APA (7th ed.) Zitazioa
Mortimore, M., & Adams, W. M. (1999). Working the Sahel: Environment and society in northern Nigeria. Routledge.
Chicago Style (17th ed.) Zitazioa
Mortimore, Michael, eta W. M. Adams. Working the Sahel: Environment and Society in Northern Nigeria. London ; New York: Routledge, 1999.
MLA (9th ed.) Zitazioa
Mortimore, Michael, eta W. M. Adams. Working the Sahel: Environment and Society in Northern Nigeria. Routledge, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.