Dik, S. C. (Simon Cornelis), author
RUL , 1994
Buku Teks
McArthur, Tom (Thomas Burns), author
Cambridge University Press, 1983
Buku Teks
Stutterheim, Cornelis Ferdinand Petrus, 1903-, author
Universitaire Pers Leiden, 1971
Buku Teks
Corder, Stephen Pit, editor
Penguin Books , 1973
Buku Teks
Fromkin, Victoria A., author
Holt, Rinehart and Winston, 1981
Buku Teks