Salustri, Cathy (14 November 2018). On Thursday, get a Sustainable Buzz along Tampa's Riverwalk. Creative Loafing Tampa. Euclid Media Group, LLC. Retrieved on 11 May 2019.
Beament, Emily; Greer, Stuart (28 March 2019). Plastic bottle deposit scheme to be introduced. Manchester Evening News. Reach plc. Retrieved on 11 May 2019.
Dohnalová, Tereza. A Solution for PET Bottles. MIWA EU. Retrieved on 11 May 2019.