Parma, C., Parma, B., Richards, J. R. A., Scharmach, J., & Scharmach, M. (2007). Piękne miasta =: Beautiful town and cities = Schöne Städte. Wydawnictwo Parma Press.
Citazione stile Chigago Style (17a edizione)Parma, Christian, Bogna Parma, James R. A. Richards, Jan Scharmach, e Margit Scharmach. Piękne Miasta =: Beautiful Town and Cities = Schöne Städte. Marki: Wydawnictwo Parma Press, 2007.
Citatione MLA (9a ed.)Parma, Christian, et al. Piękne Miasta =: Beautiful Town and Cities = Schöne Städte. Wydawnictwo Parma Press, 2007.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.