Armstrong, M. (2022). How to manage people: Fast, effective management skills that really get results (5th edition.). Kogan Page.
Lua i Stíl Chicago (17ú heag.)Armstrong, Michael. How to Manage People: Fast, Effective Management Skills That Really Get Results. 5th edition. London ; New York, NY: Kogan Page, 2022.
Lua MLA (9ú heag.)Armstrong, Michael. How to Manage People: Fast, Effective Management Skills That Really Get Results. 5th edition. Kogan Page, 2022.
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