Groot, M. D. M. Van Veen: Hoverflies of Northwestern Europe, Identification keys to the Syrphidae. KNNV Publishing, Utrecht, 2004. ISBN: 90 5011 199 8. University of Ljubljana Press (Založba Univerze v Ljubljani).
Chicago Style (17th ed.) CitationGroot, Maarten De. M. Van Veen: Hoverflies of Northwestern Europe, Identification Keys to the Syrphidae. KNNV Publishing, Utrecht, 2004. ISBN: 90 5011 199 8. University of Ljubljana Press (Založba Univerze v Ljubljani).
MLA (9th ed.) CitationGroot, Maarten De. M. Van Veen: Hoverflies of Northwestern Europe, Identification Keys to the Syrphidae. KNNV Publishing, Utrecht, 2004. ISBN: 90 5011 199 8. University of Ljubljana Press (Založba Univerze v Ljubljani).
Warning: These citations may not always be 100% accurate.