Gaya APA
Christianti, Diana. (2017).
English is easy .
Jakarta:
Grasindo.
Gaya Chicago
Christianti, Diana.
English is easy.
Jakarta:
Grasindo,
2017.
Text.
Gaya MLA
Christianti, Diana.
English is easy.
Jakarta:
Grasindo,
2017.
Text.
Gaya Turabian
Christianti, Diana.
English is easy.
Jakarta:
Grasindo,
2017.
Print.