APA (7th ed.) Zitazioa

Georviev, E. (1968). Bulgaria's Share in Human Culture. Sofia Pr.

Chicago Style (17th ed.) Zitazioa

Georviev, Emil. Bulgaria's Share in Human Culture. Sofia: Sofia Pr, 1968.

MLA (9th ed.) Zitazioa

Georviev, Emil. Bulgaria's Share in Human Culture. Sofia Pr, 1968.