Cita APA

Cummings, M. M., & Roos, C. (1969). Dr. John Shaw Billings and The American Climatological Association. American Clinical and Climatological Association.

Chicago Style Citation

Cummings, M. M., i C. Roos. Dr. John Shaw Billings and The American Climatological Association. American Clinical and Climatological Association, 1969.

Cita MLA

Cummings, M. M., i C. Roos. Dr. John Shaw Billings and The American Climatological Association. American Clinical and Climatological Association, 1969.