Não informado. (1968). Abstracts of bulgarian scientific medical literature. Ministry of Public Health, Centre for Scientific Medical Information.
Chicago-Zitierstil (17. Ausg.)Não informado. Abstracts of Bulgarian Scientific Medical Literature. Sofia: Ministry of Public Health, Centre for Scientific Medical Information, 1968.
MLA-Zitierstil (8. Ausg.)Não informado. Abstracts of Bulgarian Scientific Medical Literature. Ministry of Public Health, Centre for Scientific Medical Information, 1968.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.