Dyfyniad APA

 Mattel, B. (2016).  Catering: A guide to managing a successful business operation.  Wiley.

Dyfyniad Arddull Chicago

 Mattel, Bruce.  Catering: A Guide to Managing a Successful Business Operation.  Wiley, 2016.

Dyfyniad MLA

 Mattel, Bruce.  Catering: A Guide to Managing a Successful Business Operation.  Wiley, 2016.

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