APA

Orgill D., Gribbin J. R., . (1979). The sixth winter. London: Bodley Head.

Chicago

Orgill Douglas, Gribbin John R, . 1979. The sixth winter. London: Bodley Head.

Harvard

Orgill D., Gribbin J. R., . (1979). The sixth winter. London: Bodley Head.

MLA

Orgill Douglas, Gribbin John R, . The sixth winter. London: Bodley Head. 1979.