Markus, John, 1911-
McGraw-Hill, 1961
Buku Teks
Vane, Edwin T.
Focall Press, 1994
Buku Teks
Cazeneuve, Par Jean
Presses Universitaires de France, 1963
Buku Teks
Angus and Roberson Publishers, 1959
Buku Teks
Roberts, R.S.
Elex Media Komputindo, 1994
Buku Referensi