APA
Jackson Graham, . (1994). Difficult Concepts in Cardiology. London: Martin dunitz Ltd.
Chicago
Jackson Graham, . 1994. Difficult Concepts in Cardiology. London: Martin dunitz Ltd.
Harvard
Jackson Graham, . (1994). Difficult Concepts in Cardiology. London: Martin dunitz Ltd.
MLA
Jackson Graham, . Difficult Concepts in Cardiology. London: Martin dunitz Ltd. 1994.