William Wrenall, Quarterman Lee, editors in chief
McGraw-Hill, 1994
Buku Referensi
Lamb, Richard G., author
Prentice-Hall, 1995
Buku Teks
Epstein, Eliot, author
CRC Press, 2011
Buku Teks
Davis, Ralph Currier, author
Harper & Row, 1940
Buku Teks
Knowles, Asa S., author
Macmillan, 1946
Buku Teks