APA引文

Kovacs, K. E. (2019). Speaking for IELTS (Second edition.). Collins.

芝加哥风格引文

Kovacs, Karen E. Speaking for IELTS. Second edition. London: Collins, 2019.

MLA引文

Kovacs, Karen E. Speaking for IELTS. Second edition. Collins, 2019.

警告：这些引文格式不一定是100％准确.