Hackman, J. Richard
Addison-Wesley, 1980
Buku Teks
Lee, Rose Hume, author
J.B. Lippincott, 1955
Buku Teks
Penguin Books, 1978
Buku Teks
International cultural faundation, 1976
Buku Teks
Tindara Addabbo, Giovanni Solinas, editors
[Springer, ], 2012
eBooks