APA (7th ed.) Citation
Holas, L. Security environment at the turn of 20th and 21st century.
Chicago Style (17th ed.) Citation
Holas, Lukáš. Security Environment at the Turn of 20th and 21st Century.
MLA (9th ed.) Citation
Holas, Lukáš. Security Environment at the Turn of 20th and 21st Century.
Warning: These citations may not always be 100% accurate.