Não informado. Problems of Infectious and Parasitic Diseases. Medical Academy.
Chicago-Zitierstil (17. Ausg.)Não informado. Problems of Infectious and Parasitic Diseases. Sofia: Medical Academy.
MLA-Zitierstil (8. Ausg.)Não informado. Problems of Infectious and Parasitic Diseases. Medical Academy.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.