APA (7th ed.) Citation

Hammel, P., Varga, M., & Peteraj, K. (2007). Na II. programe sna. Opus.

Chicago Style (17th ed.) Citation

Hammel, Pavol, Marián Varga, and Kamil Peteraj. Na II. Programe Sna. Bratislava: Opus, 2007.

MLA (9th ed.) Citation

Hammel, Pavol, et al. Na II. Programe Sna. Opus, 2007.