Long, L. H., & Frey, W. H. (1982). Migration and settlement. International Institute for Applied Systems Analysis.
Citazione stile Chigago Style (17a edizione)Long, Larry H., e William H. Frey. Migration and Settlement. Laxenburg: International Institute for Applied Systems Analysis, 1982.
Citatione MLA (9a ed.)Long, Larry H., e William H. Frey. Migration and Settlement. International Institute for Applied Systems Analysis, 1982.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.