एपीए उद्धरण

(2002). Semigroups, algorithms, automata, and languages: Coimbra, Portugal, May-July 2001. River Edge, NJ: World Scientific.

शिकागो स्टाइल उद्धरण

Semigroups, Algorithms, Automata, and Languages: Coimbra, Portugal, May-July 2001. River Edge, NJ: World Scientific, 2002.

एमएलए उद्धरण

Semigroups, Algorithms, Automata, and Languages: Coimbra, Portugal, May-July 2001. River Edge, NJ: World Scientific, 2002.