Clifford, A. H., & Preston, G. B. (1964). The algebraic theory of semigroups (2nd ed.). American Mathematical Society.
Chicago Style (17th ed.) CitationClifford, A. H., and G. B. Preston. The Algebraic Theory of Semigroups. 2nd ed. Providence, Rhode Island: American Mathematical Society, 1964.
MLA (9th ed.) CitationClifford, A. H., and G. B. Preston. The Algebraic Theory of Semigroups. 2nd ed. American Mathematical Society, 1964.
Warning: These citations may not always be 100% accurate.