APA ציטוט

Dudley, R., Nikolova, K., & Vladimirov, G. (2004). Bulgaria. Sofia: Tangra TanNakRa.

Παραπομπή Chicago Style

Dudley, Renard, Kapka Nikolova, και Georgi Vladimirov. Bulgaria. Sofia: Tangra TanNakRa, 2004.

ציטוט MLA

Dudley, Renard, Kapka Nikolova, και Georgi Vladimirov. Bulgaria. Sofia: Tangra TanNakRa, 2004.