Cita APA (7a ed.)

Higgins, G. C. (2007). Christianity 101: A textbook of Catholic theology. Paulist Press.

Cita Chicago Style (17a ed.)

Higgins, Gregory C. Christianity 101: A Textbook of Catholic Theology. New York: Paulist Press, 2007.

Cita MLA (9a ed.)

Higgins, Gregory C. Christianity 101: A Textbook of Catholic Theology. Paulist Press, 2007.