Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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