Gaya APA
The Official Guide To The TOEFL Test, 5th Edition. (2017).
New York:
McGraw Hill.
Gaya Chicago
The Official Guide To The TOEFL Test, 5th Edition.
_.
New York:
McGraw Hill,
2017.
Koleksi Buku Teks.
Gaya MLA
The Official Guide To The TOEFL Test, 5th Edition.
_.
New York:
McGraw Hill,
2017.
Koleksi Buku Teks.
Gaya Turabian
The Official Guide To The TOEFL Test, 5th Edition.
New York:
McGraw Hill,
2017.
Koleksi Buku Teks.