Gaya APA
Harris, Michael, david mower, anna sikorzynska, melanie williams. (2007).
Challenges: students book 3 .
Inggris:
Pearson Education.
Gaya Chicago
Harris, Michael, david mower, anna sikorzynska, melanie williams.
Challenges: students book 3.
Inggris:
Pearson Education,
2007.
Text.
Gaya MLA
Harris, Michael, david mower, anna sikorzynska, melanie williams.
Challenges: students book 3.
Inggris:
Pearson Education,
2007.
Text.
Gaya Turabian
Harris, Michael, david mower, anna sikorzynska, melanie williams.
Challenges: students book 3.
Inggris:
Pearson Education,
2007.
Print.