Potten, H., & Potten, J. (2001). Clockwise: Elementary teacher's book. Oxford: Oxford University Press.
Trích dẫn kiểu ChicagoPotten, Heather, và Jonathan Potten. Clockwise: Elementary Teacher's Book. Oxford: Oxford University Press, 2001.
MLA citiranjePotten, Heather, và Jonathan Potten. Clockwise: Elementary Teacher's Book. Oxford: Oxford University Press, 2001.
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