Richards, J. C., & Farrell, T. S. (2005). Professional development for language teachers: Strategies for teacher learning. Cambridge University Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Richards, Jack C., و Thomas S.C Farrell. Professional Development for Language Teachers: Strategies for Teacher Learning. New York, New York: Cambridge University Press, 2005.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Richards, Jack C., و Thomas S.C Farrell. Professional Development for Language Teachers: Strategies for Teacher Learning. Cambridge University Press, 2005.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.