एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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