Nielsen Business Media, Inc. (10 August 1974). Billboard. Nielsen Business Media, Inc. pp. 58–. ISSN0006-2510. {{cite book}}: |author= has generic name (help)
Nielsen Business Media, Inc. (10 August 1974). Billboard. Nielsen Business Media, Inc. pp. 58–. ISSN0006-2510. {{cite book}}: |author= has generic name (help)