Gaya APA
Purwoko, H., Hendrarti, I. (2004).
Stepping stone 2 b: english for junior high school students grade viii (cet. i).
Jakarta:
Esis.
Gaya MLA
Purwoko, Herudjati., Hendrarti, I.M..
"Stepping stone 2 b: english for junior high school students grade viii".
cet. i
Jakarta:
Esis,
2004.
Text.