Hahner, J. C. (2002). Speech Lab CD to accompany: Speaking clearly. New York: McGraw-Hill.
استشهاد بنمط شيكاغوHahner, Jeffrey C. Speech Lab CD to Accompany: Speaking Clearly. New York: McGraw-Hill, 2002.
MLA استشهادHahner, Jeffrey C. Speech Lab CD to Accompany: Speaking Clearly. New York: McGraw-Hill, 2002.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.