Workshop Semigroups and Languages <2002, Lisbon, Portugal>. (2004). Proceedings of the Workshop Semigroups and Languages: Lisboa, Portugal, 27-29 November 2002. World Scientific.
Chicago-Zitierstil (17. Ausg.)Workshop Semigroups and Languages <2002, Lisbon, Portugal>. Proceedings of the Workshop Semigroups and Languages: Lisboa, Portugal, 27-29 November 2002. River Edge, NJ: World Scientific, 2004.
MLA-Zitierstil (9. Ausg.)Workshop Semigroups and Languages <2002, Lisbon, Portugal>. Proceedings of the Workshop Semigroups and Languages: Lisboa, Portugal, 27-29 November 2002. World Scientific, 2004.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.