APA (7th ed.) Citation

Palmer, E. (1840). A letter to those who think. [publisher not identified].

Chicago Style (17th ed.) Citation

Palmer, Edward. A Letter to Those Who Think. Worcester: [publisher not identified], 1840.

MLA (9th ed.) Citation

Palmer, Edward. A Letter to Those Who Think. [publisher not identified], 1840.

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