edited by Stavro Skendi
Frederick A. Praeger, 1957, 1958
Buku Teks SO
Rawson, D.W.
Longmans, 1966
Buku Teks
Griffith, William E.
MIT Press, 1963
Buku Teks
Jaensch, Dean Harold
Allen & Unwin, 1989
Buku Teks
Markey, Ray
New South Wales University Press, 1988
Buku Teks