edited by Stavro Skendi
Frederick A. Praeger, 1957, 1958
Buku Teks SO
Rawson, D.W.
Longmans, 1966
Buku Teks SO
Hamm, Harry
Frederick A. Praeger, 1963
Buku Teks SO
Griffith, William E.
MIT Press, 1963
Buku Teks SO
Jaensch, Dean Harold
Allen & Unwin, 1989
Buku Teks