APA
Grudzinskas J. G., . (1994). Screening for Down's Syndrome. : Cambridge University Press.
Chicago
Grudzinskas J G, . 1994. Screening for Down's Syndrome. : Cambridge University Press.
Harvard
Grudzinskas J. G., . (1994). Screening for Down's Syndrome. : Cambridge University Press.
MLA
Grudzinskas J G, . Screening for Down's Syndrome. : Cambridge University Press. 1994.