Gaya APA
Douglas, E, J., Callan, S. (1992).
Managerial economics : analysis and strategy with empirical cases (4e).
New Jersey:
Prentice Hall.
Gaya MLA
Douglas, Evan, J., Callan, Scott.
"Managerial economics : analysis and strategy with empirical cases".
4e
New Jersey:
Prentice Hall,
1992.
Buku.