Penggayaan APA
Walker. (1982).
Mathematics level 3 .
London:
Reinhard & Winston.
Chicago Style
Walker.
Mathematics level 3.
London:
Reinhard & Winston,
1982.
Text.
MLA Style
Walker.
Mathematics level 3.
London:
Reinhard & Winston,
1982.
Text.
Turabian Style
Walker.
Mathematics level 3.
London:
Reinhard & Winston,
1982.
Print.