Smółka, Paweł, i Michał Szulawski. 2011. „Personality Traits and Motivational Traits As Predictors of Social Competence. Implication for Occupational Selection Process”. Edukacja Ekonomistów I Menedżerów 22 (4):111-26. https://doi.org/10.5604/01.3001.0009.5542.