Gaya APA
Douglas, E, J.
(1995).
Managerial Economic : Analysis and Strategy
(
Ed.ke-4)
.
Singapore:
Prentice-Hall.
Gaya MLA
Douglas, Evan, J.
"Managerial Economic : Analysis and Strategy".
Ed.ke-4
Singapore:
Prentice-Hall,
1995.
Textbook.