APA Style
Etherton, A. R. B.. (1981).
Mastering Modern English: A certificate course .
Singapura:
Longman.
Chicago Style
Etherton, A. R. B..
Mastering Modern English: A certificate course.
Singapura:
Longman,
1981.
Text.
MLA Style
Etherton, A. R. B..
Mastering Modern English: A certificate course.
Singapura:
Longman,
1981.
Text.
Turabian Style
Etherton, A. R. B..
Mastering Modern English: A certificate course.
Singapura:
Longman,
1981.
Print.