Underhill, N., & Nic Underhill. (1987). Testing spoken language: A handbook of oral testing techniques. Cambridge [Cambridgeshire],New York: Cambridge University Press.
استشهاد بنمط شيكاغوUnderhill, Nic, و Nic Underhill. Testing Spoken Language: A Handbook of Oral Testing Techniques. Cambridge [Cambridgeshire],New York: Cambridge University Press, 1987.
MLA استشهادUnderhill, Nic, و Nic Underhill. Testing Spoken Language: A Handbook of Oral Testing Techniques. Cambridge [Cambridgeshire],New York: Cambridge University Press, 1987.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.