APA-viite

Nils, Bjorkman, & Nils Bjorkman. (1970). Atlas of placental bine sterubcture. Bailliere Tindall.

Chicago-tyylinen lähdeviittaus

Nils, Bjorkman, ja Nils Bjorkman. Atlas of Placental Bine Sterubcture. Bailliere Tindall, 1970.

MLA-viite

Nils, et al. Atlas of Placental Bine Sterubcture. Bailliere Tindall, 1970.