Laing Communications Inc. Laing Research Services. (1991). Correlating museum and exhibition attendance with book and catalog sales. Laing Research Services.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Laing Communications Inc. Laing Research Services. Correlating Museum and Exhibition Attendance with Book and Catalog Sales. Bellevue, WA: Laing Research Services, 1991.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Laing Communications Inc. Laing Research Services. Correlating Museum and Exhibition Attendance with Book and Catalog Sales. Laing Research Services, 1991.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.