大家好，我正在写硕士毕业论文，但还是有几个格式问题不是特别清楚，请大家帮帮忙，谢谢！！
1. 以下的这三个这样书写对不对？
Carrell, P. L. (1982). Cohesion is not coherence. TESOL Quarterly.
Oshima, A., and Hogue, A. (1997). Coherence. Introduction to Academic
Writing, White Plains, NY: Addition Wesley Longman.
Chalker, S. (2001). Collins Cobuild English Guider: 9. Linking Words. Beijing: Foreign Language Teaching and Research Press; HongKong: Commercial Press.
2. Corder, S. P. (1981a). Error Analysis and Interlanguage. Oxford: Oxford University Press.
年份后面的那个a，有的人写了，有的人没写，大家有没有知道Corder
1981年是不是写了至少两篇以上的文章在这里，所以才标的a来区别？
1. 以下的这三个这样书写对不对？
Carrell, P. L. (1982). Cohesion is not coherence. TESOL Quarterly.
Oshima, A., and Hogue, A. (1997). Coherence. Introduction to Academic
Writing, White Plains, NY: Addition Wesley Longman.
Chalker, S. (2001). Collins Cobuild English Guider: 9. Linking Words. Beijing: Foreign Language Teaching and Research Press; HongKong: Commercial Press.
2. Corder, S. P. (1981a). Error Analysis and Interlanguage. Oxford: Oxford University Press.
年份后面的那个a，有的人写了，有的人没写，大家有没有知道Corder
1981年是不是写了至少两篇以上的文章在这里，所以才标的a来区别？
