HESKETT J L. (1990). SERVICSE BREAK THROUGH. MAC MILLAN.
Cita Chicago (17th ed.)HESKETT J L. SERVICSE BREAK THROUGH. NEW YORK: MAC MILLAN, 1990.
Cita MLA (9th ed.)HESKETT J L. SERVICSE BREAK THROUGH. MAC MILLAN, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.