Cita APA (7a ed.)
Long, L. E., & Frey, W. (1982). Migration and settlement: United States. International Institute for Applied Systems Analysis.
Cita Chicago Style (17a ed.)
Long, Larry E., y W. Frey. Migration and Settlement: United States. Laxenburg: International Institute for Applied Systems Analysis, 1982.
Cita MLA (9a ed.)
Long, Larry E., y W. Frey. Migration and Settlement: United States. International Institute for Applied Systems Analysis, 1982.
Precaución: Estas citas no son 100% exactas.