APA-viite

De Luca, A., & Varrichio, S. (1999). Finiteness and regularity in semigroups and formal languages. Springer-Verlag.

Chicago-tyylinen lähdeviittaus

De Luca, Aldo, ja Stefano Varrichio. Finiteness and Regularity in Semigroups and Formal Languages. Heidelberg: Springer-Verlag, 1999.

MLA-viite

De Luca, Aldo, ja Stefano Varrichio. Finiteness and Regularity in Semigroups and Formal Languages. Springer-Verlag, 1999.