Gaya APA
Harris, Michael, david mower, anna sikorzynska. (2004).
Opportunities 3: Students book .
Inggris:
Pearson Education.
Gaya Chicago
Harris, Michael, david mower, anna sikorzynska.
Opportunities 3: Students book.
Inggris:
Pearson Education,
2004.
Text.
Gaya MLA
Harris, Michael, david mower, anna sikorzynska.
Opportunities 3: Students book.
Inggris:
Pearson Education,
2004.
Text.
Gaya Turabian
Harris, Michael, david mower, anna sikorzynska.
Opportunities 3: Students book.
Inggris:
Pearson Education,
2004.
Print.