Gaya APA
Maris, Amanda. (2007).
Challenges Workbook 4 (Cet 1).
New York:
Pearson Longman.
Gaya Chicago
Maris, Amanda.
Challenges Workbook 4.
Cet 1
New York:
Pearson Longman,
2007.
Text.
Gaya MLA
Maris, Amanda.
Challenges Workbook 4.
Cet 1
New York:
Pearson Longman,
2007.
Text.
Gaya Turabian
Maris, Amanda.
Challenges Workbook 4.
Cet 1
New York:
Pearson Longman,
2007.
Print.