Cita APA (7a ed.)
(2009). 9th International scientific conference VSU 2009. Vol. 2: Proceedings,Sofia,Bulgaria,4.-5.6.2009. L.Karavelov Civil engineering higher school Sofia.
Cita Chicago Style (17a ed.)
9th International Scientific Conference VSU 2009. Vol. 2: Proceedings,Sofia,Bulgaria,4.-5.6.2009. Sofia: L.Karavelov Civil engineering higher school Sofia, 2009.
Cita MLA (9a ed.)
9th International Scientific Conference VSU 2009. Vol. 2: Proceedings,Sofia,Bulgaria,4.-5.6.2009. L.Karavelov Civil engineering higher school Sofia, 2009.
Precaución: Estas citas no son 100% exactas.