Gaya APA
Canfield, Jack. (2013).
The Power Of Focus .
Jakarta:
PT. Elex Media Komputindo.
Gaya Chicago
Canfield, Jack.
The Power Of Focus.
Jakarta:
PT. Elex Media Komputindo,
2013.
Text.
Gaya MLA
Canfield, Jack.
The Power Of Focus.
Jakarta:
PT. Elex Media Komputindo,
2013.
Text.
Gaya Turabian
Canfield, Jack.
The Power Of Focus.
Jakarta:
PT. Elex Media Komputindo,
2013.
Print.