Adrian, Charles R., author
Mc Graw-Hill, 1976
Buku Teks
Chapman, R.J.K., author
George Allen and Unwin, 1984
Buku Teks
Burns, James McGregor, author
Prentice-Hall, 1972
Buku Teks
Burns, James McGregor, author
Prentice-Hall, 1989
Buku Teks
John HY, Ronald
Greenwood Press, 1995
Buku Teks