APA

Sayers R. R., . (19). Silicosis and tuberculosis among miners of the tri-state district of Oklahoma, Kansas and Missouri. Washington: Government Printing Office.

Chicago

Sayers R R, . 19. Silicosis and tuberculosis among miners of the tri-state district of Oklahoma, Kansas and Missouri. Washington: Government Printing Office.

Harvard

Sayers R. R., . (19). Silicosis and tuberculosis among miners of the tri-state district of Oklahoma, Kansas and Missouri. Washington: Government Printing Office.

MLA

Sayers R R, . Silicosis and tuberculosis among miners of the tri-state district of Oklahoma, Kansas and Missouri. Washington: Government Printing Office. 19.