Palmer, R.R. (Robert Roswell), 1909-2002, author
McGraw-Hill, 1992
Buku Teks
Kingston, Jeff, 1957-, author
Wiley Blackwell, 2016
Buku Teks
Cribb, Robert Bridson, author
Longman, 1995
Buku Teks
Bedford, Henry F., author
Harcourt Brace Jovanovich, 1972
Buku Teks
Sontag, Raymond James, author
Crofts, 1933.
Buku Teks