APA (7th ed.) Citation

Helios (Kremnica, Slovensko). (1920). Skalka 1240 M. Vys. [Helios?].

Chicago Style (17th ed.) Citation

Helios (Kremnica, Slovensko). Skalka 1240 M. Vys. [Kremnica?]: [Helios?], 1920.

MLA (9th ed.) Citation

Helios (Kremnica, Slovensko). Skalka 1240 M. Vys. [Helios?], 1920.

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