APA

Berridge G. R., . (1991). Return To The UN. London: Macmillan.

Chicago

Berridge G R, . 1991. Return To The UN. London: Macmillan.

Harvard

Berridge G. R., . (1991). Return To The UN. London: Macmillan.

MLA

Berridge G R, . Return To The UN. London: Macmillan. 1991.