Tất cả những tranh liên kết bên trên đều lấy theo theo những nguồn dưới đây:

• Fred Bronson's Billboard Book of Number 1 Hits, 5th Edition (ISBN 0-8230-7677-6)
• Joel Whitburn's Top Pop Singles 1955-2002 (ISBN 0-89820-155-1)
• Joel Whitburn Presents the Billboard Pop Charts, 1955-1959 (ISBN 0-89820-092-X)
• Joel Whitburn Presents the Billboard Hot 100 Charts: The Sixties (ISBN 0-89820-074-1)
• Joel Whitburn Presents the Billboard Hot 100 Charts: The Seventies (ISBN 0-89820-076-8)
• Joel Whitburn Presents the Billboard Hot 100 Charts: The Eighties (ISBN 0-89820-079-2)
• Joel Whitburn Presents the Billboard Hot 100 Charts: The Nineties (ISBN 0-89820-137-3)
• Additional information obtained can be verified within Billboard's online archive services and print editions of the magazine.