APA

4th International Conference, . (2019). International Conference on Natural Products Utilization: From Plants to Pharmacy Shelf. Haskovo: Poligrafug.

Chicago

4th International Conference, . 2019. International Conference on Natural Products Utilization: From Plants to Pharmacy Shelf. Haskovo: Poligrafug.

Harvard

4th International Conference, . (2019). International Conference on Natural Products Utilization: From Plants to Pharmacy Shelf. Haskovo: Poligrafug.

MLA

4th International Conference, . International Conference on Natural Products Utilization: From Plants to Pharmacy Shelf. Haskovo: Poligrafug. 2019.