姜玲 & 贺湘辉. (2007). 接线员工作手册: Switchboard operator workbook. 广东经济出版社.
Dyfyniad Arddull Chicago姜玲 and 贺湘辉. 接线员工作手册: Switchboard Operator Workbook. 广东经济出版社, 2007.
Dyfyniad MLA姜玲 and 贺湘辉. 接线员工作手册: Switchboard Operator Workbook. 广东经济出版社, 2007.
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