Gaya APA
New Ready for English : WorkBook 4. (2002).
Jakarta:
Widya Utama.
Gaya Chicago
New Ready for English : WorkBook 4.
Cetakan ke - 1 , 2003.
Jakarta:
Widya Utama,
2002.
Text.
Gaya MLA
New Ready for English : WorkBook 4.
Cetakan ke - 1 , 2003.
Jakarta:
Widya Utama,
2002.
Text.
Gaya Turabian
New Ready for English : WorkBook 4.
Jakarta:
Widya Utama,
2002.
Print.