KARRASS GARY. (1985). NEGOTIATE TO CLOSE HOW TO MAKE MORE SUCCESSFUL DEALS. SIMON & SCHUSTER INC.
Cita Chicago (17th ed.)KARRASS GARY. NEGOTIATE TO CLOSE HOW TO MAKE MORE SUCCESSFUL DEALS. NEW YORK: SIMON & SCHUSTER INC, 1985.
Cita MLA (9th ed.)KARRASS GARY. NEGOTIATE TO CLOSE HOW TO MAKE MORE SUCCESSFUL DEALS. SIMON & SCHUSTER INC, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.