Schwartz, Bernard, author
Pitman, 1950
Buku Teks
Inbau, Fred E.
Chilton Book Company, 1972
Buku Teks
Bohm, Robert M., author
McGraw-Hill, 2008
Buku Teks
Bohm, Robert M., author
McGraw-Hill, 2002
Buku Teks
Underhill, H.C. (Harry Clay), 1858-1918, author
Bobbs-Merrill , [19--?]
Buku Klasik