(美)杰弗里·吉特默(Jeffrey Gitomer)著. (2015). 销售圣经：终极销售资源：the ultimate sales resource. 中信出版社.
Dyfyniad Arddull Chicago(美)杰弗里·吉特默(Jeffrey Gitomer)著. 销售圣经：终极销售资源：the Ultimate Sales Resource. 中信出版社, 2015.
Dyfyniad MLA(美)杰弗里·吉特默(Jeffrey Gitomer)著. 销售圣经：终极销售资源：the Ultimate Sales Resource. 中信出版社, 2015.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.