APA aipamena

Armstrong, C. W. (1947). Positive eugenics.

Chicago Style aipamena

Armstrong, C. Wicksteed. Positive Eugenics. 1947.

MLA aipamena

Armstrong, C. Wicksteed. Positive Eugenics. 1947.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.