Cita APA (7a ed.)

Hall, T. E., Jones, P. R., & Preston, G. B. (1980). Semigroups. Academic Press.

Cita Chicago Style (17a ed.)

Hall, T. E., P. R. Jones, y G. B. Preston. Semigroups. New York: Academic Press, 1980.

Cita MLA (8a ed.)

Hall, T. E., et al. Semigroups. Academic Press, 1980.