(1990). Lessons from the field: Integration of population and environment II : Ecuador case study. World Neighbors.
Chicago Style (17. basım) AtıfLessons from the Field: Integration of Population and Environment II : Ecuador Case Study. Oklahoma City, Okla: World Neighbors, 1990.
MLA (9th ed.) AtıfLessons from the Field: Integration of Population and Environment II : Ecuador Case Study. World Neighbors, 1990.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..