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