Bodrogi, Tiban
House of the Hungarian Academy of Sciences , 1961
Buku Teks
Forrest, Thomas, author
Oxford University Press, 1969
Buku Teks
Robson, R.W., author
Pacific Publications PTY, 1954
Buku Teks
Mitchell, William E., author
W.W. Norton, 1978
Buku Teks
Wilson, Lindsay
McGraw-Hill , 1975
Buku Teks