Tocci, R. J., Widmer, N. S., & Moss, G. L. (2007). Digital systems: Principles and applications (9th ed.). Pearson Education.

Tocci, Ronald J., Neal S. Widmer, and Gregory L. Moss. Digital Systems: Principles and Applications. 9th ed. Upper Saddle River, N.J. ; Delhi: Pearson Education, 2007.

Tocci, Ronald J., et al. Digital Systems: Principles and Applications. 9th ed. Pearson Education, 2007.