Black's Medical Dictionary.

MLA

Comrie, John D. Black's Medical Dictionary. 7th ed. London: A & C Black, 1924.

APA

Comrie, J. D. (1924). Black's Medical Dictionary. 7th ed. London: A & C Black.

Chicago

Comrie, John D. Black's Medical Dictionary. 7th ed. London: A & C Black, 1924.