Uniwersytet Wrocławski. Wydawnictwo & Post, M. (1999). Festschrift for professor Jan Cygan on the occasion of his 70th birthday. Wydawnictwo Uniwersytetu Wrocławskiego.
Citazione stile Chigago Style (17a edizione)Uniwersytet Wrocławski. Wydawnictwo e Michał Post. Festschrift for Professor Jan Cygan on the Occasion of His 70th Birthday. Wrocław: Wydawnictwo Uniwersytetu Wrocławskiego, 1999.
Citatione MLA (9a ed.)Uniwersytet Wrocławski. Wydawnictwo e Michał Post. Festschrift for Professor Jan Cygan on the Occasion of His 70th Birthday. Wydawnictwo Uniwersytetu Wrocławskiego, 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.