Gaya APA
INET, Gunawan. (2015).
4 Steps English (cet.2).
Solo:
Sdtel Publishing.
Gaya Chicago
INET, Gunawan.
4 Steps English.
cet.2
Solo:
Sdtel Publishing,
2015.
Text.
Gaya MLA
INET, Gunawan.
4 Steps English.
cet.2
Solo:
Sdtel Publishing,
2015.
Text.
Gaya Turabian
INET, Gunawan.
4 Steps English.
cet.2
Solo:
Sdtel Publishing,
2015.
Print.