Gaya APA
KLAAS, K.
(1967).
The teaching of elementary school mathematics
(
Cet. 3.)
.
Boston, Mass:
Allyn and Bacon.
Gaya MLA
KLAAS, Kramer.
"The teaching of elementary school mathematics".
Cet. 3.
Boston, Mass:
Allyn and Bacon,
1967.
Buku.