^ abGranit, R.; Ratliff, F. (1985). "Haldan Keffer Hartline. 22 December 1903-18 March 1983". Biographical Memoirs of Fellows of the Royal Society. 31: 262–292. doi:10.1098/rsbm.1985.0010. ISSN0080-4606. PMID11621205.
^Sulek, K. (1969). "Nobel prize for George Wald, Haldan Keffer Hartline and Ragner Granit in 1967 for discoveries concerning the primary biochemical and physiological phenomena occurring in the process of vision". Wiadomosci Lekarskie. 22 (13): 1258–1259. PMID4897321.
^Bouman, M. A. (1968). "Ragnar Garnit, Haldan Keffer Hartline, George Wald, winners of the Nobel Prize in physiology and medicine". Nederlands Tijdschrift voor Geneeskunde. 112 (1): 23–25. PMID4875782.
^"The Nobel prize for physiology or medicine". Nordisk Medicin. 78 (44): 1429–1434. 1967. PMID4864608.