Tham khảo Cừu_Iceland

    • The word íslenski is written in lowercase: Orthographic rules (ritreglur) at the Icelandic Language Institute (Íslensk málstöð), section II. Upper- and Lower-Case Letters, subsection 9: Words derived from proper nouns are generally capitalized, [...] This never applies to adjectives containing -sk-.
    • An attempt to determine the pattern of inheritance of coat colors in hair sheep. Livestock Research for Rural Development, Vol. 16, Art. #6. Saldaña-Muñoz V R, Torres-Hernández G, González-Camacho J M, Díaz-Rivera P, González-Garduño R and Rubio-Rubio M 2004: Retrieved ngày 2 tháng 8 năm 2006
    • "Icelandic". Breeds of Livestock. Oklahoma State University, Dept. of Animal Science. Truy cập 2009-04-17.
    • Budiansky, Stephen (1999). The Covenant of the Wild: Why animals chose domestication. Yale University Press. ISBN 0-300-07993-1. 
    • Ensminger, Dr. M.E.; Dr. R.O. Parker (1986). Sheep and Goat Science, Fifth Edition. Danville, Illinois: The Interstate Printers and Publishers Inc. ISBN 0-8134-2464-X. 
    • Pugh, David G. (2001). Sheep & Goat Medicine. Elsevier Health Sciences. ISBN 0-7216-9052-1. 
    • Simmons, Paula; Carol Ekarius (2001). Storey's Guide to Raising Sheep. North Adams, MA: Storey Publishing LLC. ISBN 978-1-58017-262-2. 
    • Smith M.S., Barbara; Mark Aseltine PhD; Gerald Kennedy DVM (1997). Beginning Shepherd's Manual, Second Edition. Ames, Iowa: Iowa State University Press. ISBN 0-8138-2799-X. 
    • Weaver, Sue (2005). Sheep: small-scale sheep keeping for pleasure and profit. 3 Burroughs Irvine, CA 92618: Hobby Farm Press, an imprint of BowTie Press, a division of BowTie Inc. ISBN 1-931993-49-1. 
    • Wooster, Chuck (2005). Living with Sheep: Everything You Need to Know to Raise Your Own Flock. Geoff Hansen (Photography). Guilford, Connecticut: The Lyons Press. ISBN 1-59228-531-7.