APA
Richard Horton, . (2004). The Lancet. New York: Elsevier.
Chicago
Richard Horton, . 2004. The Lancet. New York: Elsevier.
Harvard
Richard Horton, . (2004). The Lancet. New York: Elsevier.
MLA
Richard Horton, . The Lancet. New York: Elsevier. 2004.