APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (8:e uppl.)

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