Birkett M., Espelage DL., Koenig B. LGB and questioning students in schools: the moderating effects of homophobic bullying and school climate on negative outcomes.. „Journal of youth and adolescence”. 7 (38), s. 989–1000, sierpień 2009. DOI: 10.1007/s10964-008-9389-1. PMID: 19636741.
Birkett M., Espelage DL., Koenig B. LGB and questioning students in schools: the moderating effects of homophobic bullying and school climate on negative outcomes.. „Journal of youth and adolescence”. 7 (38), s. 989–1000, sierpień 2009. DOI: 10.1007/s10964-008-9389-1. PMID: 19636741.