APA
Freeman R. L., . (2001). Practical data communication. John Wiley & Sons, New York: .
Chicago
Freeman Roger L, . 2001. Practical data communication. John Wiley & Sons, New York: .
Harvard
Freeman R. L., . (2001). Practical data communication. John Wiley & Sons, New York: .
MLA
Freeman Roger L, . Practical data communication. John Wiley & Sons, New York: . 2001.