APA (7th ed.) Citation

Berry, E. (2012). Rails: Leksykon kieszonkowy. Helion.

Chicago Style (17th ed.) Citation

Berry, Eric. Rails: Leksykon Kieszonkowy. [Gliwice, Poland?]: Helion, 2012.

MLA (9th ed.) Citation

Berry, Eric. Rails: Leksykon Kieszonkowy. Helion, 2012.

Warning: These citations may not always be 100% accurate.