Modern historians' main source of Zoltán's life is the Gesta Hungarorum, a late 12th-century chronicle whose writer is now known as Anonymous.
Tänapäeva ajaloolaste peamine allikas Zoltáni elu kohta on Gesta Hungarorum: 12. sajandi lõpust pärinev kroonika, mille autorit tuntakse nimega Anonymus.