Gaya APA
Herrera, Mario, Pinkley, Diane. (2009).
Backpack 1 : Second Edition .
USA:
Pearson Longman.
Gaya Chicago
Herrera, Mario, Pinkley, Diane.
Backpack 1 : Second Edition.
USA:
Pearson Longman,
2009.
Text.
Gaya MLA
Herrera, Mario, Pinkley, Diane.
Backpack 1 : Second Edition.
USA:
Pearson Longman,
2009.
Text.
Gaya Turabian
Herrera, Mario, Pinkley, Diane.
Backpack 1 : Second Edition.
USA:
Pearson Longman,
2009.
Print.