Gaya APA
Herudjati, P., M., H, I. (2002).
Stepping Stone English For Junior School Grade 1 .
Jakarta.:
Penerbit Erlangga.
Gaya MLA
Herudjati, Purwoko., M., Hendrarti, I..
"Stepping Stone English For Junior School Grade 1".
Jakarta.:
Penerbit Erlangga,
2002.
Text.