APA (7th ed.) Citation

Karsholt, O., & Stadel Nielsen, P. (1998). Revideret katalog over de danske sommerfugle =: Revised catalogue of the Lepidoptera of Denmark. Entomologisk forening.

Chicago Style (17th ed.) Citation

Karsholt, O., and Per Stadel Nielsen. Revideret Katalog over De Danske Sommerfugle =: Revised Catalogue of the Lepidoptera of Denmark. København: Entomologisk forening, 1998.

MLA (9th ed.) Citation

Karsholt, O., and Per Stadel Nielsen. Revideret Katalog over De Danske Sommerfugle =: Revised Catalogue of the Lepidoptera of Denmark. Entomologisk forening, 1998.