Dyfyniad APA

Lewicki, R. J. B. (2007). Essnetials of Negotiation (4th.). McGraw Hill.

Dyfyniad Arddull Chicago

Lewicki, Roy J; Barry. Essnetials of Negotiation. 4th. New York: McGraw Hill, 2007.

Dyfyniad MLA

Lewicki, Roy J; Barry. Essnetials of Negotiation. 4th. McGraw Hill, 2007.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.