Cita APA (7a ed.)

Tillich, P., & Adams, J. L. (1969). What is religion? ([1st ed.].). Harper & Row.

Cita Chicago Style (17a ed.)

Tillich, Paul, y James Luther Adams. What Is Religion? [1st ed.]. New York [etc.]: Harper & Row, 1969.

Cita MLA (9a ed.)

Tillich, Paul, y James Luther Adams. What Is Religion? [1st ed.]. Harper & Row, 1969.