Gaya APA
W.L, H, C., R, J.
(1992).
Strategi management theory
(
edisi 12)
.
USA:
Cengage Learning.
Gaya MLA
W.L, Hill, Charles., R, JonesGareth.
"Strategi management theory".
edisi 12
USA:
Cengage Learning,
1992.
Text.