Cita APA (7a ed.)
Kierkegaard, S. (1948). Purity of heart: Is to will one thing. Harper & Row.
Cita Chicago Style (17a ed.)
Kierkegaard, Soren. Purity of Heart: Is to Will One Thing. New York: Harper & Row, 1948.
Cita MLA (9a ed.)
Kierkegaard, Soren. Purity of Heart: Is to Will One Thing. Harper & Row, 1948.
Precaución: Estas citas no son 100% exactas.