APA (7th ed.) Citation

Hoffman, P. F., & Scharg, D. P. Zem - snehová guľa.

Chicago Style (17th ed.) Citation

Hoffman, Paul F., and Daniel P. Scharg. Zem - Snehová Guľa.

MLA (9th ed.) Citation

Hoffman, Paul F., and Daniel P. Scharg. Zem - Snehová Guľa.

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