Topley, W. W. C., Wilson, J., & Lewis, E. R. (1925). Immunisation and Selection as Factors in Herd-Resistance.
استشهاد بنمط شيكاغوTopley, W. W. C., J. Wilson, و E. R. Lewis. Immunisation and Selection As Factors in Herd-Resistance. 1925.
MLA استشهادTopley, W. W. C., J. Wilson, و E. R. Lewis. Immunisation and Selection As Factors in Herd-Resistance. 1925.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.