APA (7th ed.) Citation

Long, L. H., & Frey, W. H. (1982). Migration and settlement. International Institute for Applied Systems Analysis.

Chicago Style (17th ed.) Citation

Long, Larry H., and William H. Frey. Migration and Settlement. Laxenburg: International Institute for Applied Systems Analysis, 1982.

MLA (9th ed.) Citation

Long, Larry H., and William H. Frey. Migration and Settlement. International Institute for Applied Systems Analysis, 1982.