APA引文

Nelson, J. How to write impressive business letters. Goodwill Pub..

芝加哥风格引文

Nelson, Jens. How to Write Impressive Business Letters. New Delhi: Goodwill Pub..

MLA引文

Nelson, Jens. How to Write Impressive Business Letters. Goodwill Pub..

警告：这些引文格式不一定是100％准确.