APA
Hicks J. F., Daly H. E. j. a., Davis S. H. j. a. & Freitas M. d. L. (1990). Ecuador's Amazon region. Washington, DC: The World Bank.
Chicago
Hicks James F, Daly Herman E jt author, Davis Shelton H jt author and Freitas Maria de Lourdes. 1990. Ecuador's Amazon region. Washington, DC: The World Bank.
Harvard
Hicks J. F., Daly H. E. j. a., Davis S. H. j. a. and Freitas M. d. L. (1990). Ecuador's Amazon region. Washington, DC: The World Bank.
MLA
Hicks James F, Daly Herman E jt author, Davis Shelton H jt author and Freitas Maria de Lourdes. Ecuador's Amazon region. Washington, DC: The World Bank. 1990.