APA Edition Citation

Penrose, L. (1963). Biology of mental defect. (Ed1,Ed3.).

Chicago Edition Citation

Penrose, Ls. Biology of Mental Defect. Ed1,Ed3. 1963.

MLA Edition Citation

Penrose, Ls. Biology of Mental Defect. Ed1,Ed3. 1963.

Warning: These citations may not always be 100% accurate.