Rogoza, Radosław, Magdalena Żemojtel-Piotrowska, and William Keith Campbel. 2018. “Measurement of Narcissism: From Classical Applications to Modern Approaches”. Studia Psychologica: Theoria Et Praxis 18 (1):27-48. https://doi.org/10.21697/sp.2018.18.1.02.