Gaya APA
Petersen, H, C., Lewis, W, C.
(1998).
Manajerial economics ed. 4
(
4)
.
Singapore:
Prentice Hall International.
Gaya MLA
Petersen, H, Craig., Lewis, W., CRis.
"Manajerial economics ed. 4".
4
Singapore:
Prentice Hall International,
1998.
Text.