Holstein-Friesian Association of America & Houghton, F. L. Holstein-Friesian herd-book. Holstein-Friesian Association of American.
Lua i Stíl Chicago (17ú heag.)Holstein-Friesian Association of America agus Frederick Lowell Houghton. Holstein-Friesian Herd-book. Brattleboro, Vt. [etc.]: Holstein-Friesian Association of American.
Lua MLA (8ú heag.)Holstein-Friesian Association of America agus Frederick Lowell Houghton. Holstein-Friesian Herd-book. Holstein-Friesian Association of American.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.