Não informado. (2020). Abstracts of Bulgarian Scientific Literature. Agricultural Academy, Center for Scientific, Technic and Economic Information.
Chicago-Zitierstil (17. Ausg.)Não informado. Abstracts of Bulgarian Scientific Literature. Sofia: Agricultural Academy, Center for Scientific, Technic and Economic Information, 2020.
MLA-Zitierstil (8. Ausg.)Não informado. Abstracts of Bulgarian Scientific Literature. Agricultural Academy, Center for Scientific, Technic and Economic Information, 2020.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.