Gaya APA
Nellis, J, G.
(2000).
The Essence of The Economy Ekonomi
.
Yogyakarta:
DRA.ANTIK TRI SUSANTI.
Gaya MLA
Nellis, Joseph, G.
"The Essence of The Economy Ekonomi".
Yogyakarta:
DRA.ANTIK TRI SUSANTI,
2000.
Text.