APA (7th ed.) Citation
Beer, G., Marčan, P., & Slovák, K. Poštové služby.
Chicago Style (17th ed.) Citation
Beer, Gabriel, Peter Marčan, and Kristian Slovák. Poštové Služby.
MLA (9th ed.) Citation
Beer, Gabriel, et al. Poštové Služby.
Warning: These citations may not always be 100% accurate.