APA (7th ed.) Citation

Gregory, O. (1851). Letters on the evidences, doctrines, and duties, of the Christian religion, addressed to a friend (Ninth edition.). H.G. Bohn.

Chicago Style (17th ed.) Citation

Gregory, Olinthus. Letters on the Evidences, Doctrines, and Duties, of the Christian Religion, Addressed to a Friend. Ninth edition. London: H.G. Bohn, 1851.

MLA (9th ed.) Citation

Gregory, Olinthus. Letters on the Evidences, Doctrines, and Duties, of the Christian Religion, Addressed to a Friend. Ninth edition. H.G. Bohn, 1851.

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