[publisher not identified], [date of publication no identified]
Buku Teks
Kendall, Henry M., author
Harcourt, Brace & World, 1962
Buku Teks
Pounds, Norman J. G., author
Silver Burdett, 1980
Buku Teks
Crang, Mike, author
Routledge, 1998
Buku Teks
Kaplan, David, author
John Wiley & Sons, 2009
Buku Teks