Readers should cite both the Bio-protocol preprint and the original research article where this protocol was used:

Liu, X, Nealson, K and Zhou, S(2021). Determination of cellular redox state and ATP concentration. Bio-protocol Preprint. bio-protocol.org/prep1366.
Liu, X., Huang, L., Rensing, C., Ye, J., Nealson, K. H. and Zhou, S.(2021). Syntrophic interspecies electron transfer drives carbon fixation and growth by Rhodopseudomonas palustris under dark, anoxic conditions. Science Advances 7(27). DOI: 10.1126/sciadv.abh1852