APA (7th ed.) Citation

Alencar & Rocha. (2005). Communication systems. Springer.

Chicago Style (17th ed.) Citation

Alencar and Rocha. Communication Systems. Brazil: Springer, 2005.

MLA (9th ed.) Citation

Alencar and Rocha. Communication Systems. Springer, 2005.

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