Ullman, J. D. (1976). Fundamental concepts of programming systems. Addison-Wesley Publishing Company.
Cita Chicago (17th ed.)Ullman, Jeffrey D. Fundamental Concepts of Programming Systems. Reading, Massachusetts: Addison-Wesley Publishing Company, 1976.
Cita MLA (9th ed.)Ullman, Jeffrey D. Fundamental Concepts of Programming Systems. Addison-Wesley Publishing Company, 1976.
Atenció: Aquestes cites poden no estar 100% correctes.