Gaya APA
Abdullah, Ridwan. (2015).
The Secret .
Jakarta:
Artech House.
Gaya Chicago
Abdullah, Ridwan.
The Secret.
Jakarta:
Artech House,
2015.
Text.
Gaya MLA
Abdullah, Ridwan.
The Secret.
Jakarta:
Artech House,
2015.
Text.
Gaya Turabian
Abdullah, Ridwan.
The Secret.
Jakarta:
Artech House,
2015.
Print.