Higgins, P. M. (1992). Techniques of semigroup theory. Oxford University Press.
Chicago Style aipamenaHiggins, Peter M. Techniques of Semigroup Theory. Oxford [England] ; New York: Oxford University Press, 1992.
MLA aipamenaHiggins, Peter M. Techniques of Semigroup Theory. Oxford University Press, 1992.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.