APA (7th ed.) Citation

Harnack, A. v., & Saunders, T. B. (1901). What is Christianity?: Lectures delivered in the University of Berlin during the winter-term 1899-1900 (2d ed., rev.). G.P. Putnam's Sons.

Chicago Style (17th ed.) Citation

Harnack, Adolf von, and T. Bailey Saunders. What Is Christianity?: Lectures Delivered in the University of Berlin During the Winter-term 1899-1900. 2d ed., rev. New York London: G.P. Putnam's Sons, 1901.

MLA (9th ed.) Citation

Harnack, Adolf von, and T. Bailey Saunders. What Is Christianity?: Lectures Delivered in the University of Berlin During the Winter-term 1899-1900. 2d ed., rev. G.P. Putnam's Sons, 1901.

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