Wolkowski, Z. W. (2017). Marija: Blažena Djevica Marija u hrvatskom pjesništvu, kaligrafski ispis odabranih stihova = Blessed Virgin Mary in Croatian poetry, chosen verses written in calligraphy. Croatian Mariological Institute, Catholic Faculty of Theology, University of Zagreb.
Chicago-referens (17:e uppl.)Wolkowski, Z. W. Marija: Blažena Djevica Marija U Hrvatskom Pjesništvu, Kaligrafski Ispis Odabranih Stihova = Blessed Virgin Mary in Croatian Poetry, Chosen Verses Written in Calligraphy. Zagreb: Croatian Mariological Institute, Catholic Faculty of Theology, University of Zagreb, 2017.
MLA-referens (8:e uppl.)Wolkowski, Z. W. Marija: Blažena Djevica Marija U Hrvatskom Pjesništvu, Kaligrafski Ispis Odabranih Stihova = Blessed Virgin Mary in Croatian Poetry, Chosen Verses Written in Calligraphy. Croatian Mariological Institute, Catholic Faculty of Theology, University of Zagreb, 2017.