Gaya APA
Purnomo, A. (2009).
Information and Communication Technology 1 for Senior High School Year X .
Yogyakarta:
Yudhistira.
Gaya MLA
Purnomo, Andi.
"Information and Communication Technology 1 for Senior High School Year X".
Yogyakarta:
Yudhistira,
2009.
Text.