HEHNER C R. (1991). THE LOGIC OF PROGRAMMING. PRENTICE - HALL.
Cita Chicago (17th ed.)HEHNER C R. THE LOGIC OF PROGRAMMING. PRENTICE - HALL, 1991.
Cita MLA (9th ed.)HEHNER C R. THE LOGIC OF PROGRAMMING. PRENTICE - HALL, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.