Jensen, Merrill, author
Kriger, 1979
Buku Teks
Mendelson, Wallace, author
Dorsey Press, 1980
Buku Teks
Tate, Allen
New York: GP Putnam's Sons, 1938
Buku Teks
Kelly, Alfred H.
W.W Norton & Company Inc., c 19
Buku Teks
Kelly, Alfred H.
W.W. Norton & Company. Inc., 1963
Buku Teks