Dyfyniad APA

Cassidy, D. (1993). It`s when you sell that counts. Vision Books.

Dyfyniad Arddull Chicago

Cassidy, Donald. It`s When You Sell That Counts. New Delhi: Vision Books, 1993.

Dyfyniad MLA

Cassidy, Donald. It`s When You Sell That Counts. Vision Books, 1993.

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