Heller, D. A. (2004). Teachers wanted: Attracting and retaining good teachers. Association for Supervision and Curriculum Development.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Heller, Daniel A. Teachers Wanted: Attracting and Retaining Good Teachers. Alexandria, Virginia: Association for Supervision and Curriculum Development, 2004.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Heller, Daniel A. Teachers Wanted: Attracting and Retaining Good Teachers. Association for Supervision and Curriculum Development, 2004.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.