Gaya APA
, ., Novak, D.
(1989).
Developmental mathematics
.
Lexington:
Lexington: D.C. Heath and Company; 1989.
Gaya MLA
, ., Novak, David.
"Developmental mathematics".
Lexington:
Lexington: D.C. Heath and Company; 1989,
1989.
Text.