Susan H. Cooperman. Professional Office Procedures (5.). Pearson India.
Cita Chicago (17th ed.)Susan H. Cooperman. Professional Office Procedures. 5. Pearson India.
Cita MLA (8th ed.)Susan H. Cooperman. Professional Office Procedures. 5. Pearson India.
Atenció: Aquestes cites poden no estar 100% correctes.