Burger, A., & Hajdu, G. (1970). Economic problems of consumers' services. Akadémiai Kiadó.
Cita Chicago (17th ed.)Burger, Anna, i Gy Hajdu. Economic Problems of Consumers' Services. Budapest: Akadémiai Kiadó, 1970.
Cita MLA (9th ed.)Burger, Anna, i Gy Hajdu. Economic Problems of Consumers' Services. Akadémiai Kiadó, 1970.