Gibson, Cyrus F., author
Lexington Books , 1987
Buku Teks
Miklos Kengyel
Springer, 2012
eBooks
Manoff, Richard K.
Praeger Publ., 1985
Buku Teks
Valerie Freeman, Rebecca Freeman
Chandos Publishing, 2017
Buku Teks
Altman, Edward I.
John Wiley & Sons, 1993
Buku Teks