Cita APA (7th ed.)

Summers, D. C. S. (2003). Quality (3rd ed.). Prentice Hall.

Cita Chicago (17th ed.)

Summers, Donna C. S. Quality. 3rd ed. Columbus, Ohio: Prentice Hall, 2003.

Cita MLA (8th ed.)

Summers, Donna C. S. Quality. 3rd ed. Prentice Hall, 2003.