Hultnäs, C. A. (1959). Studies on variation in mating behavior and semen picture in young bulls of the Swedish red-and-white breed and on causes of this variation. Almqvist & Wiksells.
Lua i Stíl Chicago (17ú heag.)Hultnäs, C. A. Studies on Variation in Mating Behavior and Semen Picture in Young Bulls of the Swedish Red-and-white Breed and on Causes of This Variation. Uppsala: Almqvist & Wiksells, 1959.
Lua MLA (8ú heag.)Hultnäs, C. A. Studies on Variation in Mating Behavior and Semen Picture in Young Bulls of the Swedish Red-and-white Breed and on Causes of This Variation. Almqvist & Wiksells, 1959.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.