Cita APA (7a ed.)
Holas, L. Security environment at the turn of 20th and 21st century.
Cita Chicago Style (17a ed.)
Holas, Lukáš. Security Environment at the Turn of 20th and 21st Century.
Cita MLA (9a ed.)
Holas, Lukáš. Security Environment at the Turn of 20th and 21st Century.
Precaución: Estas citas no son 100% exactas.