Columbia subject headings:
Ethics, Modern--19th century.
Kierkegaard, Søren, 1813-1855--Ethics.
Harvard subject headings:
Ethics, Modern--19th century.
Kierkegaard, Søren, 1813-1855--Ethics.
Princeton subject headings:
Kierkegaard, Søren, 1813-1855--Ethics.
Kierkegaard, Søren, 1813-1855. Enten-eller.
Kierkegaard, Søren, 1813-1855. Stadier paa livets vej.