APA (7th ed.) Citation

Du Maurier, D. (1966). I'll never be young again. Penguin Books.

Chicago Style (17th ed.) Citation

Du Maurier, Daphne. I'll Never Be Young Again. Harmondsworth, [etc.]: Penguin Books, 1966.

MLA (9th ed.) Citation

Du Maurier, Daphne. I'll Never Be Young Again. Penguin Books, 1966.

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