Summers, D. C. S. (2003). Quality (3rd ed.). Prentice Hall.
Chicagoスタイル(17版)引用形式Summers, Donna C. S. Quality. 3rd ed. Columbus, Ohio: Prentice Hall, 2003.
MLA(8版)引用形式Summers, Donna C. S. Quality. 3rd ed. Prentice Hall, 2003.
警告: この引用は必ずしも正確ではありません.