Ahmed, Pervaiz K., author
Pearson Prentice Hall, 2010
Buku Teks
Grime, J.P., author
John Wiley & Sons, 1979
Buku Teks
Becerra-Fernandez, Irma, author
Routledge, 2015
Buku Teks
Ostwald, Phillip F., 1931-, author
John Wiley & Sons, 1997
Buku Teks
Cashmore, Carol, author
Prentice-Hall, 1991
Buku Teks