David, R., & Alla, H. (1992). Petri nets and Grafcet: Tools for modelling discrete event systems. Prentice Hall.
Cita Chicago (17th ed.)David, Rene, i Hassane Alla. Petri Nets and Grafcet: Tools for Modelling Discrete Event Systems. New York: Prentice Hall, 1992.
Cita MLA (9th ed.)David, Rene, i Hassane Alla. Petri Nets and Grafcet: Tools for Modelling Discrete Event Systems. Prentice Hall, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.