APA Citation

 Stallings, W. (2017).  Network security essentials: Applications and standards.  Pearson.

Chicago Style Citation

 Stallings, William.  Network Security Essentials: Applications and Standards.  Pearson, 2017.

MLA Citation

 Stallings, William.  Network Security Essentials: Applications and Standards.  Pearson, 2017.

Warning: These citations may not always be 100% accurate.