Gaya APA
R., K., H. (1975).
The open classroom : a practical guide to a new way of teaching / Herbert R. Kohl .
London:
Methuen n Co.
Gaya MLA
Kohl, Herbert, R..
"The open classroom : a practical guide to a new way of teaching / Herbert R. Kohl".
London:
Methuen n Co,
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Skripsi.