APA (7th ed.) Citation

Adams D. Douglas. (1987). Dirk Gently's Holistic Detective Agency. London, Pan Books, 1987.

Chicago Style (17th ed.) Citation

Adams D. Douglas. Dirk Gently's Holistic Detective Agency. London, Pan Books, 1987, 1987.

MLA (9th ed.) Citation

Adams D. Douglas. Dirk Gently's Holistic Detective Agency. London, Pan Books, 1987, 1987.

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