APA način citiranja

Pastijn, F. J., & Petrich, M. (1985). Regular semigroups as extensions.

Čikaški stil citiranja

Pastijn, F J., i M. Petrich. Regular Semigroups as Extensions. Pitman Advanced Publishing Program, Boston, 1985.

MLA način citiranja

Pastijn, F J., i M. Petrich. Regular Semigroups as Extensions. 1985.