Gaya APA
Widmer, N, S. et al (2018).
Digital systems principles and applications twelfth edition (Ed. 12. ; Cet. 13.).
England:
Pearson Education.
Gaya MLA
Widmer, Neal, S.. et al.
"Digital systems principles and applications twelfth edition".
Ed. 12. ; Cet. 13.
England:
Pearson Education,
2018.
Text.