Vogel, S. (1975). Campanula rotundifolia (Campanulaceae): Pollination durch Apis mellifica (Hyenoptera) - Melittophilie ([Sonderdr.].).
Chicago Style (17th ed.) CitationVogel, Stefan. Campanula Rotundifolia (Campanulaceae): Pollination Durch Apis Mellifica (Hyenoptera) - Melittophilie. [Sonderdr.]. 1975.
MLA (9th ed.) CitationVogel, Stefan. Campanula Rotundifolia (Campanulaceae): Pollination Durch Apis Mellifica (Hyenoptera) - Melittophilie. [Sonderdr.]. 1975.
Warning: These citations may not always be 100% accurate.