Heller, D. A. (2004). Teachers wanted: Attracting and retaining good teachers. Association for Supervision and Curriculum Development.
Lua i Stíl Chicago (17ú heag.)Heller, Daniel A. Teachers Wanted: Attracting and Retaining Good Teachers. Alexandria, Virginia: Association for Supervision and Curriculum Development, 2004.
Lua MLA (9ú heag.)Heller, Daniel A. Teachers Wanted: Attracting and Retaining Good Teachers. Association for Supervision and Curriculum Development, 2004.
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