Cita APA

Gibson, J. R., & McKeown, T. (1952). Observations on all Births (23,970) in Birmingham, 1947: VI. Birth Weight, Duration of Gestation, and Survival Related to Sex.

Citación estilo Chicago

Gibson, J. R., y Thomas McKeown. Observations On All Births (23,970) in Birmingham, 1947: VI. Birth Weight, Duration of Gestation, and Survival Related to Sex. 1952.

Cita MLA

Gibson, J. R., y Thomas McKeown. Observations On All Births (23,970) in Birmingham, 1947: VI. Birth Weight, Duration of Gestation, and Survival Related to Sex. 1952.