Halpern, S. L. (1970). The medical clinics of North America.
Chicago-čujuhus (17. p.)Halpern, Seymour Lionel. The Medical Clinics of North America. 1970.
MLA-čujuhus (9. p.)Halpern, Seymour Lionel. The Medical Clinics of North America. 1970.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.