A Universal second language
The Hankes Foundation, 1992
Multimedia
The universal dictionary of the English language
edited by Henry Cecil
George Routledge & Sons, 1946
Buku Referensi
Lyons, John
Natural language and universal grammar
Cambridge University Press, 1991
eBooks
Hankes, Elmer Joseph
A universal second language / Elmer Joseph Hankes
The Hankes Foundation, 1992
Buku Teks
Second language learnr's access to parameters of universal grammar: a syntactic perspective
Artikel Jurnal