Gaya APA
Principles of language learning and teaching. (2000).
New York:
Pearson Education.
Gaya Chicago
Principles of language learning and teaching.
4th ed..
New York:
Pearson Education,
2000.
Buku.
Gaya MLA
Principles of language learning and teaching.
4th ed..
New York:
Pearson Education,
2000.
Buku.
Gaya Turabian
Principles of language learning and teaching.
New York:
Pearson Education,
2000.
Buku.