Douglas, E. J. (1987). Managerial economics: Analysis and strategy (3rd ed.). Prentice-Hall.
Chicago-viite (17. p.)Douglas, Evan J. Managerial Economics: Analysis and Strategy. 3rd ed. Englewood Cliffs, N.J.: Prentice-Hall, 1987.
MLA-viite (9. p.)Douglas, Evan J. Managerial Economics: Analysis and Strategy. 3rd ed. Prentice-Hall, 1987.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.