APA

Gupta, Agarwala K. N. & Agaraeala P. A. (2005). Digital Signature. New Delhi: Prentice-Hall Of India.

Chicago

Gupta, Agarwala Kamlesh N and Agaraeala Prateek A. 2005. Digital Signature. New Delhi: Prentice-Hall Of India.

Harvard

Gupta, Agarwala K. N. and Agaraeala P. A. (2005). Digital Signature. New Delhi: Prentice-Hall Of India.

MLA

Gupta, Agarwala Kamlesh N and Agaraeala Prateek A. Digital Signature. New Delhi: Prentice-Hall Of India. 2005.