Cook, Guy W.D.
Language play, language learning
Oxford University Press, 2000
 Buku Teks
Language and language learning
edited by Albert H. Marckwardt
National Council of Teachers of English, 1968
 Buku Teks SO
McAllister, Harry E.
Elements of business and economic statistics learning
John Wiley, 1975
 Buku Teks
Cook, Vivian
Second language learning and language teaching
ARNOLD, 2001
 Buku Teks
Dickinson, Leslie
Self-instruction in language learning
Cambridge University Press , 1987
 Buku Teks