APA Style
HS, S. (2000).
PRINCIPLES AND STANDARDS FOR SCHOOL MATHEMATICS .
United States of America:
NATIONAL COUNCIL OF EACHERS OF MATHEMATIS.
MLA Style
HS, Soegeng.
"PRINCIPLES AND STANDARDS FOR SCHOOL MATHEMATICS".
United States of America:
NATIONAL COUNCIL OF EACHERS OF MATHEMATIS,
2000.
Buku PGSD.