APA-referens

Clifford, A. H., & Preston, G. B. (1961). Algebraic theory of semigroups V 1. American Mathematical Society.

Chicago-stil citat

Clifford, A. H., och G. B. Preston. Algebraic Theory of Semigroups V 1. Rhode Island: American Mathematical Society, 1961.

MLA-referens

Clifford, A. H., och G. B. Preston. Algebraic Theory of Semigroups V 1. American Mathematical Society, 1961.