APA

Callahan P. J. T., Callahan J., . (1950). The law of medicine. New York: Oceana Publications.

Chicago

Callahan Parnell Joseph Terrence, Callahan Justin, . 1950. The law of medicine. New York: Oceana Publications.

Harvard

Callahan P. J. T., Callahan J., . (1950). The law of medicine. New York: Oceana Publications.

MLA

Callahan Parnell Joseph Terrence, Callahan Justin, . The law of medicine. New York: Oceana Publications. 1950.