Ur, P. (1992). Five-minute activities: A resource book of short activities. Cambridge,New York: Cambridge University Press.
Trích dẫn kiểu ChicagoUr, Penny. Five-minute Activities: A Resource Book of Short Activities. Cambridge,New York: Cambridge University Press, 1992.
Deismireacht MLAUr, Penny. Five-minute Activities: A Resource Book of Short Activities. Cambridge,New York: Cambridge University Press, 1992.
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