APA

Cox Richard Hubert Francis, . (1986). The Columbus option. London: Secker & Warburg.

Chicago

Cox Richard Hubert Francis, . 1986. The Columbus option. London: Secker & Warburg.

Harvard

Cox Richard Hubert Francis, . (1986). The Columbus option. London: Secker & Warburg.

MLA

Cox Richard Hubert Francis, . The Columbus option. London: Secker & Warburg. 1986.