Gaya APA
Efficient English Lesson. (1987).
Klaten:
John Wiley.
Gaya Chicago
Efficient English Lesson.
.
Klaten:
John Wiley,
1987.
Text.
Gaya MLA
Efficient English Lesson.
.
Klaten:
John Wiley,
1987.
Text.
Gaya Turabian
Efficient English Lesson.
Klaten:
John Wiley,
1987.
Print.