Gaya APA
..., M, ., [, E, ]. et al (2007).
English on sky 2 for junior high school students year viii (Cet. 3).
Jakarta:
Erlangga.
Gaya MLA
..., Mukarto, ..., [, Et.al, ]. et al.
"English on sky 2 for junior high school students year viii".
Cet. 3
Jakarta:
Erlangga,
2007.
Text.