Cita APA (7th ed.)

Keller, G. (2012). Managerial statistics: Abbreviated (9th ed.). Cengage Learning.

Cita Chicago (17th ed.)

Keller, Gerald. Managerial Statistics: Abbreviated. 9th ed. Australia : South-Western: Cengage Learning, 2012.

Cita MLA (9th ed.)

Keller, Gerald. Managerial Statistics: Abbreviated. 9th ed. Cengage Learning, 2012.