MLA

Health and Efficiency League of America (Battle Creek, Mich.). The Health and Efficiency League of America : an announcement of its aims, organization, propaganda, and privileges of membership ; issued at Battle Creek, Michigan, from the headquarters of the League, in the Fall of 1909. 1909.. https://collections.library.yale.edu/catalog/33328991.

APA, 6th edition

Health and Efficiency League of America (Battle Creek, Mich.). (1909.)[The Health and Efficiency League of America : an announcement of its aims, organization, propaganda, and privileges of membership ; issued at Battle Creek, Michigan, from the headquarters of the League, in the Fall of 1909]. https://collections.library.yale.edu/catalog/33328991.