APA

Penrose L. S., . (1966). The biology of mental defect. N.Y: Grune & Stratton.

Chicago

Penrose Lionel Sharples, . 1966. The biology of mental defect. N.Y: Grune & Stratton.

Harvard

Penrose L. S., . (1966). The biology of mental defect. N.Y: Grune & Stratton.

MLA

Penrose Lionel Sharples, . The biology of mental defect. N.Y: Grune & Stratton. 1966.