APA (7th ed.) Citation

Johnson, S. (2004). Preface to a Dictionary of the English Language. Project Gutenberg.

Chicago Style (17th ed.) Citation

Johnson, Samuel. Preface to a Dictionary of the English Language. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Johnson, Samuel. Preface to a Dictionary of the English Language. Project Gutenberg, 2004.

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