APA
Richard Horton, . (2003). The Lancet. New York: Elseiver.
Chicago
Richard Horton, . 2003. The Lancet. New York: Elseiver.
Harvard
Richard Horton, . (2003). The Lancet. New York: Elseiver.
MLA
Richard Horton, . The Lancet. New York: Elseiver. 2003.