Bacaan lanjut John_Howard_Northrop

  • Northrop, J. H. (1939), Crystalline Enzymes, Columbia University Press 
  • Shampo, M A; Kyle, R. A. (2000), "John Northrop--definitive study of enzymes", Mayo Clin. Proc. (diterbitkan March 2000), 75 (3), m/s. 254, doi:10.4065/75.3.254, PMID 10725951 
  • van Helvoort, T. (1992), "The controversy between John H. Northrop and Max Delbrück on the formation of bacteriophage: bacterial synthesis or autonomous multiplication?", Annals of Science (diterbitkan November 1992), 49 (6), m/s. 545–75, doi:10.1080/00033799200200451, PMID 11616207