APA
Wingrave H., Harrold R., . (1978). Dances, music and costumes of Bulgaria. [England]: Helen Wingrave and Robert Harrold.
Chicago
Wingrave Helen, Harrold Robert, . 1978. Dances, music and costumes of Bulgaria. [England]: Helen Wingrave and Robert Harrold.
Harvard
Wingrave H., Harrold R., . (1978). Dances, music and costumes of Bulgaria. [England]: Helen Wingrave and Robert Harrold.
MLA
Wingrave Helen, Harrold Robert, . Dances, music and costumes of Bulgaria. [England]: Helen Wingrave and Robert Harrold. 1978.