APA (7th ed.) Citation

Market House Books (Aylesbury, Anglicko). (1990). The Penguin Spelling Dictionary. Penguin Books.

Chicago Style (17th ed.) Citation

Market House Books (Aylesbury, Anglicko). The Penguin Spelling Dictionary. London: Penguin Books, 1990.

MLA (9th ed.) Citation

Market House Books (Aylesbury, Anglicko). The Penguin Spelling Dictionary. Penguin Books, 1990.

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