Gaya APA
Harris, Michael, david mower, anna sikorzynska, melanie williams. (2006).
Challenges: students book 1 .
Inggris:
Pearson Education.
Gaya Chicago
Harris, Michael, david mower, anna sikorzynska, melanie williams.
Challenges: students book 1.
Inggris:
Pearson Education,
2006.
Text.
Gaya MLA
Harris, Michael, david mower, anna sikorzynska, melanie williams.
Challenges: students book 1.
Inggris:
Pearson Education,
2006.
Text.
Gaya Turabian
Harris, Michael, david mower, anna sikorzynska, melanie williams.
Challenges: students book 1.
Inggris:
Pearson Education,
2006.
Print.