APA Style
Smith, Douglas B. (1981).
An activity approach to elementary concepts of mathematics. .
:
Addison- Wesley.
Chicago Style
Smith, Douglas B.
An activity approach to elementary concepts of mathematics..
:
Addison- Wesley,
1981.
Buku Teks.
MLA Style
Smith, Douglas B.
An activity approach to elementary concepts of mathematics..
:
Addison- Wesley,
1981.
Buku Teks.
Turabian Style
Smith, Douglas B.
An activity approach to elementary concepts of mathematics..
:
Addison- Wesley,
1981.
Buku Teks.