Nielsen Business Media, Inc. (12 June 1982). Billboard. Nielsen Business Media, Inc. pp. A/NZ–4. ISSN0006-2510. {{cite book}}: |author= has generic name (help)
Nielsen Business Media, Inc. (12 June 1982). Billboard. Nielsen Business Media, Inc. pp. A/NZ–4. ISSN0006-2510. {{cite book}}: |author= has generic name (help)