Urdang international. (2020). Urdang international: Bringing London's West End Training To The World. Theurdang international.
Chicago Style (17th ed.) ZitazioaUrdang international. Urdang International: Bringing London's West End Training To The World. London: Theurdang international, 2020.
MLA (9th ed.) ZitazioaUrdang international. Urdang International: Bringing London's West End Training To The World. Theurdang international, 2020.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.