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Journal
Child Youth Serv Rev
Volume
95
Pages
217-25
Publication year
2018
Suggested citation
Twardowska-Staszek E, Zych I, Ortega-Ruiz R. Bullying and cyberbullying in Polish elementary and middle schools: Validation of questionnaires and nature of the phenomena. Child Youth Serv Rev. 2018; 95: 217-25.