Gaya APA
Beaumont, John. (2006).
North Star : Building Skills for the TOEFL iBT .
USA:
Pearson Education Inc..
Gaya Chicago
Beaumont, John.
North Star : Building Skills for the TOEFL iBT.
USA:
Pearson Education Inc.,
2006.
Text.
Gaya MLA
Beaumont, John.
North Star : Building Skills for the TOEFL iBT.
USA:
Pearson Education Inc.,
2006.
Text.
Gaya Turabian
Beaumont, John.
North Star : Building Skills for the TOEFL iBT.
USA:
Pearson Education Inc.,
2006.
Print.