APA Style

Lewis, H, R., Papadimitriou, C, H. (c1998). Elements of the theory of computation (2nd ed.). New Delhi: PHI Learning Private Limited.

MLA Style

Lewis, Harry, R.., Papadimitriou, Christos, H.. "Elements of the theory of computation". 2nd ed. New Delhi: PHI Learning Private Limited, c1998. print.