Sibthorp, R. W. (1843). The true path for the true churchman wandering in the mazes of Protestantism: Exemplified in two letters in answer to the enquiry "Why have you become a Catholic?" : including a reply to Rev. Messrs. Palmer and Dodsworth (From last rev. London ed.). Casserly & Sons.

Sibthorp, Richard Waldo. The True Path for the True Churchman Wandering in the Mazes of Protestantism: Exemplified in Two Letters in Answer to the Enquiry "Why Have You Become a Catholic?" : Including a Reply to Rev. Messrs. Palmer and Dodsworth. From last rev. London ed. New York: Casserly & Sons, 1843.

Sibthorp, Richard Waldo. The True Path for the True Churchman Wandering in the Mazes of Protestantism: Exemplified in Two Letters in Answer to the Enquiry "Why Have You Become a Catholic?" : Including a Reply to Rev. Messrs. Palmer and Dodsworth. From last rev. London ed. Casserly & Sons, 1843.