Don S. Balka. A Guide to Mathematics Leadership: Sequencing Instructional Change. SAGE.
Lua i Stíl Chicago (17ú heag.)Don S. Balka. A Guide to Mathematics Leadership: Sequencing Instructional Change. SAGE.
Lua MLA (8ú heag.)Don S. Balka. A Guide to Mathematics Leadership: Sequencing Instructional Change. SAGE.
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