Production Piece References Tunes, C. (no date) Royalty-free background audio tracks, Envato Elements. Available at: https://elements.envato.com/audio/background (Accessed: 17 May 2024).  Unlimited stock videos, music, Photos & Graphics (no date) Envato Elements. Available at: https://elements.envato.com/ (Accessed: 16 May 2024).