Butterfield,Jeff. (2019). Soft Skills For Everyone (2nd ed.). Cengage Learning India.
Cita Chicago (17th ed.)Butterfield,Jeff. Soft Skills For Everyone. 2nd ed. Delhi: Cengage Learning India, 2019.
Cita MLA (9th ed.)Butterfield,Jeff. Soft Skills For Everyone. 2nd ed. Cengage Learning India, 2019.
Atenció: Aquestes cites poden no estar 100% correctes.