APA (7th ed.) Citation

Heinlein, R. A. (1980). The day after tomorrow. New English Library.

Chicago Style (17th ed.) Citation

Heinlein, Robert A. The Day After Tomorrow. London: New English Library, 1980.

MLA (8th ed.) Citation

Heinlein, Robert A. The Day After Tomorrow. New English Library, 1980.

Warning: These citations may not always be 100% accurate.