Butterfield,Jeff. (2019). Soft Skills For Everyone (2nd ed.). Cengage Learning India.
芝加哥风格引文Butterfield,Jeff. Soft Skills For Everyone. 2nd ed. Delhi: Cengage Learning India, 2019.
MLA引文Butterfield,Jeff. Soft Skills For Everyone. 2nd ed. Cengage Learning India, 2019.
警告：这些引文格式不一定是100％准确.