APA (7th ed.) Citation

Rodari, G., Hečko, B., & Mikulka, A. Fialka na severnom póle.

Chicago Style (17th ed.) Citation

Rodari, Gianni, Blahoslav Hečko, and Alois Mikulka. Fialka Na Severnom Póle.

MLA (9th ed.) Citation

Rodari, Gianni, et al. Fialka Na Severnom Póle.