APA (7th ed.) Citation

Petrich, M. (1973). Introduction to semigroups. Merrill.

Chicago Style (17th ed.) Citation

Petrich, Mario. Introduction to Semigroups. Columbus, Ohio: Merrill, 1973.

MLA (9th ed.) Citation

Petrich, Mario. Introduction to Semigroups. Merrill, 1973.

Warning: These citations may not always be 100% accurate.