Andersson, H. (2000). Photoperiodism in pigs: Studies on timing of male puberty and melatonin. Swedish University of Agricultural Sciences.
Lua i Stíl Chicago (17ú heag.)Andersson, Håkan. Photoperiodism in Pigs: Studies on Timing of Male Puberty and Melatonin. Uppsala: Swedish University of Agricultural Sciences, 2000.
Lua MLA (8ú heag.)Andersson, Håkan. Photoperiodism in Pigs: Studies on Timing of Male Puberty and Melatonin. Swedish University of Agricultural Sciences, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.