Basil, George C.
The John C. WInston, 1940
Buku Teks
Bush, Laura, author
Simon & Schuster, 2010
Buku Teks
Woodward, Bob, author
Simon & Schuster, 2002
Buku Teks
van der Dussen, Jan
Springer, 2012
eBooks
Smith, Jean Edward
Simon & Schuster,, 2016
Buku Teks