Gaya APA
IANTORNO, G., PAPA, M. (2006).
Way Points Plus for Junior High School (SMP) Grade VII .
Jakarta:
Erlangga.
Gaya MLA
IANTORNO, Giuliano., PAPA, Mario.
"Way Points Plus for Junior High School (SMP) Grade VII".
Jakarta:
Erlangga,
2006.
REFERENSI.