Gaya APA
Harrera, Mario, Pinkley, Diane. (2009).
Workbook backpack 4 second edition .
USA:
Pearson Longman.
Gaya Chicago
Harrera, Mario, Pinkley, Diane.
Workbook backpack 4 second edition.
USA:
Pearson Longman,
2009.
Text.
Gaya MLA
Harrera, Mario, Pinkley, Diane.
Workbook backpack 4 second edition.
USA:
Pearson Longman,
2009.
Text.
Gaya Turabian
Harrera, Mario, Pinkley, Diane.
Workbook backpack 4 second edition.
USA:
Pearson Longman,
2009.
Print.