Spreyer, L. (2002). Teaching is an art: An A-Z handbook for successful teaching in middle schools and high schools. Corwin Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Spreyer, Leon. Teaching Is an Art: An A-Z Handbook for Successful Teaching in Middle Schools and High Schools. Thousand Oaks, Calif: Corwin Press, 2002.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Spreyer, Leon. Teaching Is an Art: An A-Z Handbook for Successful Teaching in Middle Schools and High Schools. Corwin Press, 2002.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.