Nowadays, the reference electrode is routinely employed in what is known as "three-electrode system", alongside the working electrode (the interface of interest) and the counter electrode. Various electrodes can serve as references, depending on the reaction environment, but it is crucial for authors to explicitly indicate them . Despite the widespread use of reference electrodes, the representation of the reference scale (REF) in electrochemical results does not seem to be as well-integrated as the use of the electrode itself. In the literature, you can find several ways of representing the reference scale and there are three that can be generalized here to represent the others: