Gaya APA

Lewis, H, R., Papadimitriou, C, H. (1998). Elements of the theory of computation . United Stated of Amerika: Prentice-Hall.

Gaya MLA

Lewis, Harry, R.., Papadimitriou, Cristos, H.. "Elements of the theory of computation". United Stated of Amerika: Prentice-Hall, 1998. Text.