Gaya APA
Cholik, A., Sigijono, C, A. (2009).
Math for Junior High School 1st Semester Grade IX .
Jakarta:
Penerbit Erlangga.
Gaya MLA
Cholik, Adinawan., Sigijono, Cholik, Adinawan.
"Math for Junior High School 1st Semester Grade IX".
Jakarta:
Penerbit Erlangga,
2009.
.