American Quarter Horse Association. (1941). Official stud book and registry of the American Quarter Horse Association. AQHA.
Chicago-referens (17:e uppl.)American Quarter Horse Association. Official Stud Book and Registry of the American Quarter Horse Association. Fort Worth, Tex.: AQHA, 1941.
MLA-referens (8:e uppl.)American Quarter Horse Association. Official Stud Book and Registry of the American Quarter Horse Association. AQHA, 1941.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.