Laver, John, author
Cambridge University Press, 1995
eBooks
Heffner, R.M.S., author
University of Wisconsin Press, 1960
Buku Teks
Romadhani, examiner
Aldine, 1968
Buku Teks SO
Mol, Hendrik, 1919-1981, author
Mouton, 1963
Buku Teks
Mol, Hendrik, 1919-1981, author
Mouton, 1970
Buku Teks