Gaya APA
Space. (2018).
Inggris:
Pearson Education Limited.
Gaya Chicago
Space.
.
Inggris:
Pearson Education Limited,
2018.
Text.
Gaya MLA
Space.
.
Inggris:
Pearson Education Limited,
2018.
Text.
Gaya Turabian
Space.
Inggris:
Pearson Education Limited,
2018.
Print.