APA Style
G.C.E. 'O' Level English. (2011).
Singapore:
Fairfield Book Publishers.
Chicago Style
G.C.E. 'O' Level English.
.
Singapore:
Fairfield Book Publishers,
2011.
Text.
MLA Style
G.C.E. 'O' Level English.
.
Singapore:
Fairfield Book Publishers,
2011.
Text.
Turabian Style
G.C.E. 'O' Level English.
Singapore:
Fairfield Book Publishers,
2011.
Print.