APA Style
Salivahanan, S. (2015, 2019).
Digital signal processing (3rd Edition, 4th Edition).
New Delhi:
Tata McGraw Hill Education Private Ltd.
MLA Style
Salivahanan, S..
"Digital signal processing".
3rd Edition, 4th Edition
New Delhi:
Tata McGraw Hill Education Private Ltd,
2015, 2019.
Text.