Craf, J. R. (1952). Economic development of the United States. McGraw-Hill.
Chicago-viite (17. p.)Craf, John Riley. Economic Development of the United States. New York: McGraw-Hill, 1952.
MLA-viite (9. p.)Craf, John Riley. Economic Development of the United States. McGraw-Hill, 1952.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.