Hubell, Jay Broadus, author
Macmillan, 1922
Buku Teks
edited by A.R. Chisolm and J.J. Quinn
Angus and Roberson, 1962
Buku Teks
F.X. Adji Samekto, author
Gramedia, 1976
Buku Teks
Bateson, FW
Longmans , 1965
Buku Teks
Blamires, Harry, author
Routledge, 1994
Buku Teks