Creating orthographies for endangered languages
edited by Mari C. Jones, Damien Mooney
Cambridge University Press, 2017
 Buku Teks SO
Evans, Nicholas
Dying words : endangered languages and what they have to tell us
Wiley-Blackwell, 2010
 Buku Teks SO
The Cambridge handbook of thinking and reasoning
edited by Keith J. Holyoak, Robert G. Morrison
Cambridge University Press, 2005
 Buku Referensi
Bakich, Michael E.
The Cambridge planetary handbook
Cambridge University Press, 1999
 Buku Referensi
Mackerras, Colin
The Cambridge handbook of contemporary China
Cambridge University Press, 1991
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