Wright, Chester
Massachusetts Addison-Wesley 1973,
Buku Teks
Silcock, Arnold
Faber and Faber, 1936
Buku Teks
Roe, Frederick William
Harcourt, Brace and Company, 1928
Buku Teks
Viking Press, 1949
Buku Teks
Baclawski, Kenneth, author
CRC Press, Taylor & Francis Group, 2008
Buku Teks