Marsono
Gadjah Mada University Press, 2013
Buku Teks
Laver, John
Cambridge University Press, 1995
eBooks
Heffner, R.M.S.
University of Wisconsin Press, 1960
Buku Teks
Romadhani, examiner
Aldine, 1968
Buku Teks
Mol, Hendrik, 1919-1981
Mouton, 1963
Buku Teks