Gaya APA
Langrehr, John. (2006).
Thinking Skills .
Jakarta:
Elex Media Komputindo.
Gaya Chicago
Langrehr, John.
Thinking Skills.
Jakarta:
Elex Media Komputindo,
2006.
Text.
Gaya MLA
Langrehr, John.
Thinking Skills.
Jakarta:
Elex Media Komputindo,
2006.
Text.
Gaya Turabian
Langrehr, John.
Thinking Skills.
Jakarta:
Elex Media Komputindo,
2006.
Print.