APA

Barr L., .Churchills Pocket Book of Oncology. New York: Churchill Living Stone.

Chicago

Barr Lester, .Churchills Pocket Book of Oncology. New York: Churchill Living Stone.

Harvard

Barr L., .Churchills Pocket Book of Oncology. New York: Churchill Living Stone.

MLA

Barr Lester, .New York: Churchill Living Stone. .