Sabin, W. A. (1996). The Gregg reference manual (Eight Edition.). Glencoe.
Cita Chicago (17th ed.)Sabin, William A. The Gregg Reference Manual. Eight Edition. Lake Forest, Ill: Glencoe, 1996.
Cita MLA (9th ed.)Sabin, William A. The Gregg Reference Manual. Eight Edition. Glencoe, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.