Locker, K. O. (1997). Business and administrative communication (3rd ed.). Irwin, Tata McGraw-Hill.

Locker, Kitty O. Business and Administrative Communication. 3rd ed. Chicago : New Delhi: Irwin, Tata McGraw-Hill, 1997.

Locker, Kitty O. Business and Administrative Communication. 3rd ed. Irwin, Tata McGraw-Hill, 1997.