Burbano Garneff, M. D. (2003). Activities for business correspondence.
芝加哥风格引文Burbano Garneff, María Dolores. Activities for Business Correspondence. 2003.
MLA引文Burbano Garneff, María Dolores. Activities for Business Correspondence. 2003.
警告：这些引文格式不一定是100％准确.