Cita APA (7a ed.)
Machen, J. G. (1925). What is faith? The Macmillan company.
Cita Chicago Style (17a ed.)
Machen, J. Gresham. What Is Faith? New York: The Macmillan company, 1925.
Cita MLA (9a ed.)
Machen, J. Gresham. What Is Faith? The Macmillan company, 1925.
Precaución: Estas citas no son 100% exactas.