Cita APA (7a ed.)
Johnson, R. A. (1980). The practice of cardiology. Little Brown.
Cita Chicago Style (17a ed.)
Johnson, Robert Arnold. The Practice of Cardiology. Massachusetts: Little Brown, 1980.
Cita MLA (9a ed.)
Johnson, Robert Arnold. The Practice of Cardiology. Little Brown, 1980.
Precaución: Estas citas no son 100% exactas.