Cita APA

Willoughby, E. F. (1893). Handbook of public health and demography ([3d ed.].). Macmillan.

Citación estilo Chicago

Willoughby, Edward F. Handbook of Public Health and Demography. [3d ed.]. London: Macmillan, 1893.

Cita MLA

Willoughby, Edward F. Handbook of Public Health and Demography. [3d ed.]. Macmillan, 1893.