Dyfyniad APA

Petrich, M. (1977). Lectures in Semigroups. New York: John Wiley and Sons.

Dyfyniad Arddull Chicago

Petrich, Mario. Lectures in Semigroups. New York: John Wiley and Sons, 1977.

Dyfyniad MLA

Petrich, Mario. Lectures in Semigroups. New York: John Wiley and Sons, 1977.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.