"Word Up! – Single". iTunes. March 14, 2014. Archived from the original on September 21, 2014. Retrieved June 7, 2014.
archive.org
Jonathan Buckley; Mark Ellingham (1996). Rough Guides Ltd (ed.). Rock: The Rough Guide. Rough Guides. ISBN978-1858282015. "Word Up" was funk's last stand before it was completely swallowed up by hip-hop culture.
"ČNS IFPI" (in Czech). Hitparáda – Radio Top 100 Oficiální. IFPI Czech Republic. Note: Select 14. týden 2014 in the date selector.
imgur.com
"Mel B ARIA chart history complete". ARIA. Retrieved July 20, 2024 – via Imgur.com. N.B. The High Point number in the NAT column represents the release's peak on the national chart.
"Word Up – CAMEO". VRT (in Dutch). Top30-2.radio2.be. Archived from the original on April 9, 2012. Retrieved July 31, 2013. Hoogste notering in de top 30 : 8
"Word Up – GUN". VRT (in Dutch). Top30-2.radio2.be. Archived from the original on April 9, 2012. Retrieved July 31, 2013.
"Word Up – CAMEO". VRT (in Dutch). Top30-2.radio2.be. Archived from the original on April 9, 2012. Retrieved July 31, 2013. Hoogste notering in de top 30 : 8