Polskie Towarzystwo Miłośników Astronomii. (1956). Annual Scientific Supplement to Urania: The popular astronomical magazine published by the Polish Amateur Astronomical Society. PAAS.
Citazione stile Chigago Style (17a edizione)Polskie Towarzystwo Miłośników Astronomii. Annual Scientific Supplement to Urania: The Popular Astronomical Magazine Published by the Polish Amateur Astronomical Society. Cracow: PAAS, 1956.
Citatione MLA (9a ed.)Polskie Towarzystwo Miłośników Astronomii. Annual Scientific Supplement to Urania: The Popular Astronomical Magazine Published by the Polish Amateur Astronomical Society. PAAS, 1956.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.