APA (7th ed.) Citation

Higgins, P. M. (1991). Techniques of semigroup theory. Oxford University Press.

Chicago Style (17th ed.) Citation

Higgins, Peter M. Techniques of Semigroup Theory. Oxford [England] ; New York: Oxford University Press, 1991.

MLA (9th ed.) Citation

Higgins, Peter M. Techniques of Semigroup Theory. Oxford University Press, 1991.