APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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