Vernon, R., & Wells, L. T. (1976). Economic environment of international business (2d ed.). Prentice-Hall.
Chicago-viite (17. p.)Vernon, Raymond, ja Louis T. Wells. Economic Environment of International Business. 2d ed. Englewood Cliffs, N.J.: Prentice-Hall, 1976.
MLA-viite (8. p.)Vernon, Raymond, ja Louis T. Wells. Economic Environment of International Business. 2d ed. Prentice-Hall, 1976.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.