APA (7th ed.) Citation

L/iapin, E. S. (1968). Semigroups (Rev. ed.].). American Mathematical Society.

Chicago Style (17th ed.) Citation

L/iapin, E. S. Semigroups. Rev. ed.]. Providence: American Mathematical Society, 1968.

MLA (9th ed.) Citation

L/iapin, E. S. Semigroups. Rev. ed.]. American Mathematical Society, 1968.