APA Style
West, Keith. (1990).
GCSE Economics .
London:
Letts Educational.
Chicago Style
West, Keith.
GCSE Economics.
London:
Letts Educational,
1990.
Text.
MLA Style
West, Keith.
GCSE Economics.
London:
Letts Educational,
1990.
Text.
Turabian Style
West, Keith.
GCSE Economics.
London:
Letts Educational,
1990.
Print.