Zinsser, H., Hopkins, J. G., & Ottenberg, R. (1921). A laboratory course in serum study: Bacteriology 208, being a series of experiments and diagnostic tests in immunology carried out in an optional course given to medical and graduate students in the Department of bacteriology, College of physicians and surgeons, Columbia University, New York (2d ed., rev.). The Macmillan company.

Zinsser, Hans, Joseph Gardner Hopkins, agus Reuben Ottenberg. A Laboratory Course in Serum Study: Bacteriology 208, Being a Series of Experiments and Diagnostic Tests in Immunology Carried Out in an Optional Course Given to Medical and Graduate Students in the Department of Bacteriology, College of Physicians and Surgeons, Columbia University, New York. 2d ed., rev. New York: The Macmillan company, 1921.

Zinsser, Hans, et al. A Laboratory Course in Serum Study: Bacteriology 208, Being a Series of Experiments and Diagnostic Tests in Immunology Carried Out in an Optional Course Given to Medical and Graduate Students in the Department of Bacteriology, College of Physicians and Surgeons, Columbia University, New York. 2d ed., rev. The Macmillan company, 1921.