Gaya APA
Learning and Teaching Arithmetic. (1969).
Amerika:
Allyn And Bacon.
Gaya Chicago
Learning and Teaching Arithmetic.
Ed. 2.
Amerika:
Allyn And Bacon,
1969.
.
Gaya MLA
Learning and Teaching Arithmetic.
Ed. 2.
Amerika:
Allyn And Bacon,
1969.
.
Gaya Turabian
Learning and Teaching Arithmetic.
Amerika:
Allyn And Bacon,
1969.
.