Dyfyniad APA

Sewell, C. (2002). Customers for Life (1st.). Crown Business.

Dyfyniad Arddull Chicago

Sewell, Carl. Customers for Life. 1st. Crown Business, 2002.

Dyfyniad MLA

Sewell, Carl. Customers for Life. 1st. Crown Business, 2002.

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