Riordan, Jan, author
Mosby, 1983
Buku Teks
Smerdon, Richard, author
Sweet and Maxwel, 2007
Buku Teks
Croxton, Frederick E., author
Prentice-Hall, 1960
Buku Teks
Foulke, Roy Anderson, 1896-, author
McGraw-Hill, 1968
Buku Teks
Sullivan, Kenneth M., author
Van Nostrand Reinhold, 1983
Buku Teks