Yasso, Warren E.
New York: Holt, Rinehart and Winston, 1965
Buku Teks
Yasso, Warren E.
New York: Holt, Rinehart and Winston, 1965
Buku Teks
LIPI Press, 2014
Majalah, Jurnal, Buletin
Yasso, Warren E.
Holt, Rinehart and Winston, Inc., 1965
Buku Teks
The Open University. Course Team
The Open University Press, 1984
Buku Referensi