APA (7th ed.) Citation

Howie, J. M. (1976). An introduction to semigroup theory. Academic Press.

Chicago Style (17th ed.) Citation

Howie, John M. An Introduction to Semigroup Theory. London: Academic Press, 1976.

MLA (8th ed.) Citation

Howie, John M. An Introduction to Semigroup Theory. Academic Press, 1976.

Warning: These citations may not always be 100% accurate.