Gaya APA
Adinawan, C., Sugijono, .
(2009).
Math for junior high school : 1st semester grade IX
.
Jakarta:
Erlangga.
Gaya MLA
Adinawan, Cholik., Sugijono, .
"Math for junior high school : 1st semester grade IX".
Jakarta:
Erlangga,
2009.
Text.