APA

Oppenheim A. V., Willsky & Nawab S. H. (1997). Signals & systems [2nd ed.]. New Delhi: PHI Learning.

Chicago

Oppenheim Alan V, Willsky and Nawab S Hamid. 1997. Signals & systems [2nd ed.]. New Delhi: PHI Learning.

Harvard

Oppenheim A. V., Willsky and Nawab S. H. (1997). Signals & systems [2nd ed.]. New Delhi: PHI Learning.

MLA

Oppenheim Alan V, Willsky and Nawab S Hamid. Signals & systems [2nd ed.]. New Delhi: PHI Learning. 1997.