Gaya APA
Denhalm, R, A. (1968).
Mathematics: structure
skills / Richard A. Denhalm, V. Dale Blank .
:
Science Research Associates.
Gaya MLA
Denhalm, Richard, A..
"Mathematics: structure
skills / Richard A. Denhalm, V. Dale Blank".
:
Science Research Associates,
1968.
Referensi.