APA

,, . (1968). Britain : An official handbook, 1968. London: Central Office of Information.

Chicago

,, . 1968. Britain : An official handbook, 1968. London: Central Office of Information.

Harvard

,, . (1968). Britain : An official handbook, 1968. London: Central Office of Information.

MLA

,, . Britain : An official handbook, 1968. London: Central Office of Information. 1968.