Gaya APA
Wheelen, T, L., Hunger, J, D. (2000).
Strategic Managaement Business Policy (7th Ed.).
Amerika:
Prentice Hall International.
Gaya MLA
Wheelen, Thomas, L.., Hunger, J., David.
"Strategic Managaement Business Policy".
7th Ed.
Amerika:
Prentice Hall International,
2000.
BUKU.