Van Damme, Pierre; Van Herck, Koen (2007-03-01). "A review of the long-term protection after hepatitis A and B vaccination". Travel Medicine and Infectious Disease. 1st International Conference of Travel Medicine and Infectious Disease1st International Conference of Travel Medicine and Infectious Disease. 5 (2): 79–84. doi:10.1016/j.tmaid.2006.04.004. PMID17298912.
Tetanus: Prevention, Mayo Clinic, 2006-09-21, diarkibkan daripada yang asal pada 2008-06-24, dicapai pada 2008-07-17
nih.gov
pubmed.ncbi.nlm.nih.gov
Van Damme, Pierre; Van Herck, Koen (2007-03-01). "A review of the long-term protection after hepatitis A and B vaccination". Travel Medicine and Infectious Disease. 1st International Conference of Travel Medicine and Infectious Disease1st International Conference of Travel Medicine and Infectious Disease. 5 (2): 79–84. doi:10.1016/j.tmaid.2006.04.004. PMID17298912.
Committee, Institute of Medicine (US) Vaccine Safety; Stratton, Kathleen R.; Howe, Cynthia J.; Richard B. Johnston, Jr (1994-01-01). "Immunologic Reactions" (dalam bahasa Inggeris). National Academies Press (US). Cite journal requires |journal= (bantuan)
Charles A Janeway, Jr; Travers, Paul; Walport, Mark; Shlomchik, Mark J. (2001-01-01). "Immunological memory" (dalam bahasa Inggeris). Cite journal requires |journal= (bantuan)
web.archive.org
Tetanus: Prevention, Mayo Clinic, 2006-09-21, diarkibkan daripada yang asal pada 2008-06-24, dicapai pada 2008-07-17
wikipedia.org
en.wikipedia.org
Committee, Institute of Medicine (US) Vaccine Safety; Stratton, Kathleen R.; Howe, Cynthia J.; Richard B. Johnston, Jr (1994-01-01). "Immunologic Reactions" (dalam bahasa Inggeris). National Academies Press (US). Cite journal requires |journal= (bantuan)
Charles A Janeway, Jr; Travers, Paul; Walport, Mark; Shlomchik, Mark J. (2001-01-01). "Immunological memory" (dalam bahasa Inggeris). Cite journal requires |journal= (bantuan)