DeLisi, Matt
Jones and Barlett Publishers, 2010
Buku Teks
Alarid, Leanne Fiftal
Wadsworth and Cengage Learning, 2013
Buku Teks
Eldefonso, Edward
Glencoe Press, 1974
Buku Teks
Jarvis, Dwight C.
McGraw-Hill, 1978
Buku Teks
Archambeault, William G.
Prentice-Hall, 1982
Buku Teks