Strahlem, Richard E.
Lexander Hamilton Institute , 1961
Buku Teks
Carroll, Phil
McGraw-Hill, 1954
Buku Teks
Thomas, William E., author
South-Western Publishing, 1988
Buku Teks
Matanovic, Da vovin, author
Springer, 2012
eBooks
Potts, Keith, author
Taylor &Fransic, 2008
Buku Teks