APA

Drabble Margaret, . (1979). The ice age. Middlesex: Penguin Books.

Chicago

Drabble Margaret, . 1979. The ice age. Middlesex: Penguin Books.

Harvard

Drabble Margaret, . (1979). The ice age. Middlesex: Penguin Books.

MLA

Drabble Margaret, . The ice age. Middlesex: Penguin Books. 1979.