Παραπομπή APA

Arnold & ARNOLD Klopper. (1969). Foetus and placenta. Blackwell scientific publications.

Παραπομπή Chicago Style

Arnold και ARNOLD Klopper. Foetus and Placenta. Blackwell scientific publications, 1969.

Παραπομπή MLA

Arnold και ARNOLD Klopper. Foetus and Placenta. Blackwell scientific publications, 1969.