Cooper, S., & Hutton, W. (1991). The silver cow: A Welsh tale (1st Aladdin Books ed.). Aladdin Books ; Collier Macmillan Canada ; Maxwell Macmillan International Pub. Group.
Lua i Stíl Chicago (17ú heag.)Cooper, Susan, agus Warwick Hutton. The Silver Cow: A Welsh Tale. 1st Aladdin Books ed. New York : Toronto : New York: Aladdin Books ; Collier Macmillan Canada ; Maxwell Macmillan International Pub. Group, 1991.
Lua MLA (8ú heag.)Cooper, Susan, agus Warwick Hutton. The Silver Cow: A Welsh Tale. 1st Aladdin Books ed. Aladdin Books ; Collier Macmillan Canada ; Maxwell Macmillan International Pub. Group, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.