Gaya APA
Alam, .
(2011).
Economics 2A : For senior High School Grade XI semester 1
(
Cet. 1)
.
JAKARTA:
Esis.
Gaya MLA
Alam, .
"Economics 2A : For senior High School Grade XI semester 1".
Cet. 1
JAKARTA:
Esis,
2011.
Text.