Getis, Arthur, author
McGraw-Hill Higher Education, 2009
Buku Teks
Mitchell, Laura, 1958-, author
Oxford University Press, 2007
Buku Teks
Griffiths, David J., author
Prentice-Hall, 1989
Buku Teks
Griffiths, David J., author
Prentice-Hall, 1999
Buku Teks
Johnson, Kenneth D., author
The Benjamin, 1984
Buku Teks