APA
Zamek Królewski (Warsaw P., Grabski J., . (1990). Opus sacrum : catalogue of the exhibition from the collection of Barbara Piasecka Johnson, Royal Castle in Warsaw, Warsaw, 1990. Vienna: IRSA Verlag.
Chicago
Zamek Królewski (Warsaw Poland), Grabski Józef, . 1990. Opus sacrum : catalogue of the exhibition from the collection of Barbara Piasecka Johnson, Royal Castle in Warsaw, Warsaw, 1990. Vienna: IRSA Verlag.
Harvard
Zamek Królewski (Warsaw P., Grabski J., . (1990). Opus sacrum : catalogue of the exhibition from the collection of Barbara Piasecka Johnson, Royal Castle in Warsaw, Warsaw, 1990. Vienna: IRSA Verlag.
MLA
Zamek Królewski (Warsaw Poland), Grabski Józef, . Opus sacrum : catalogue of the exhibition from the collection of Barbara Piasecka Johnson, Royal Castle in Warsaw, Warsaw, 1990. Vienna: IRSA Verlag. 1990.