APA (7th ed.) Citation

Duff, A. (1984). That's life! (1st published, 3rd printing.). University Press.

Chicago Style (17th ed.) Citation

Duff, Alan. That's Life! 1st published, 3rd printing. Cambridge [etc.]: University Press, 1984.

MLA (9th ed.) Citation

Duff, Alan. That's Life! 1st published, 3rd printing. University Press, 1984.