Gaya APA

Spaemann, R. (2000). Happiness and benevolence. Afterword by Arthur Madigan, transl. by Jeremiah Alberg. : Glück und Wohlwollen. 1989 . Edinburgh: Edinburgh T&T Clark.

Gaya MLA

Spaemann, Robert. "Happiness and benevolence. Afterword by Arthur Madigan, transl. by Jeremiah Alberg. : Glück und Wohlwollen. 1989 ". Edinburgh: Edinburgh T&T Clark, 2000. Buku.