APA-viite

Clifford, A. H. (1961). Algebraic theory of semigroups, Vol.1.

Chicago-tyylinen lähdeviittaus

Clifford, A H. Algebraic Theory of Semigroups, Vol.1. American Mathematical Society, New York, 1961.

MLA-viite

Clifford, A H. Algebraic Theory of Semigroups, Vol.1. 1961.