Dyfyniad APA

Lewicki, R. J. B. (2016). Essentials of Negotiation. John Wiley and Sons.

Dyfyniad Arddull Chicago

Lewicki, Roy J; Barry. Essentials of Negotiation. New Jersey: John Wiley and Sons, 2016.

Dyfyniad MLA

Lewicki, Roy J; Barry. Essentials of Negotiation. John Wiley and Sons, 2016.

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