American Quarter Horse Association. (1941). Official stud book and registry of the American Quarter Horse Association. AQHA.
Citace podle Chicago (17th ed.)American Quarter Horse Association. Official Stud Book and Registry of the American Quarter Horse Association. Fort Worth, Tex.: AQHA, 1941.
Citace podle MLA (8th ed.)American Quarter Horse Association. Official Stud Book and Registry of the American Quarter Horse Association. AQHA, 1941.
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