https://doi.org/10.1351/goldbook.S05913

Quantity defined by E° =- Δ r G° n F = R T n F ln, where Δ r G° is the standard Gibbs energy of the cell reaction in the direction in which reduction occurs at the right-hand electrode in the diagram representing the cell ('reduction at right'), K° is the standard equilibrium constant for this reaction, n its charge number, F the Faraday constant, R the gas constant and T the thermodynamic temperature.*Source: *

Green Book, 2^{nd} ed., p. 58 (https://goldbook.iupac.org/files/pdf/green_book_2ed.pdf)

Green Book, 2