APA (7th ed.) Citation

Hutchinson (Firm) & Ayto, J. (2003). Dictionary of difficult words. Bounty Books.

Chicago Style (17th ed.) Citation

Hutchinson (Firm) and John Ayto. Dictionary of Difficult Words. London: Bounty Books, 2003.

MLA (9th ed.) Citation

Hutchinson (Firm) and John Ayto. Dictionary of Difficult Words. Bounty Books, 2003.