APA aipamena

Peter Bakurdjiev. (1974). Bulgaria: Questions and answers. New Jersey.

Chicago Style aipamena

Peter Bakurdjiev. Bulgaria: Questions and Answers. New Jersey, 1974.

MLA aipamena

Peter Bakurdjiev. Bulgaria: Questions and Answers. New Jersey, 1974.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.