Culbertson, J. M. (1971). Economic development: An ecological approach. New York: Knopf.
Чикагска система за цитиранеCulbertson, John Mathew. Economic Development: An Ecological Approach. New York: Knopf, 1971.
MLA формат за цитиранеCulbertson, John Mathew. Economic Development: An Ecological Approach. New York: Knopf, 1971.
Внимание: Тези цитати може да не са 100% точни.