[publisher not identified], [date of publication not identified]
Buku Teks
Thoolen, Hans, author
Martinus Nijhoff Publishers, 1986
Buku Teks
Nickel, James W., author
Gramedia Pustaka Utama, 1996
Buku Teks
Conn Meckler , 1990
Buku Teks
Sijthoff & Noordhoff , 1979
Buku Teks