Penggayaan APA
KRULIK, Stephen . (1980).
Problem solving in school mathematics .
Virginia:
The National Council of Teachers of Mathematics.
Chicago Style
KRULIK, Stephen .
Problem solving in school mathematics.
Virginia:
The National Council of Teachers of Mathematics,
1980.
Text.
MLA Style
KRULIK, Stephen .
Problem solving in school mathematics.
Virginia:
The National Council of Teachers of Mathematics,
1980.
Text.
Turabian Style
KRULIK, Stephen .
Problem solving in school mathematics.
Virginia:
The National Council of Teachers of Mathematics,
1980.
Print.