Rawlinson, H.G.
Cresset Press, 1952
Buku Teks
Beasley, W.G
University of California Press , 1999
Buku Teks
Rawlison, H.G.
Frederick A Praeger, 1952
Buku Teks
Fitzgerald, C.P.
Frederick A. Praeger Publishers, 1961
Buku Teks
Eto, Jun
International Society for Educationa Information, 1974
Buku Teks