APA
Barth K., Braun D., . (1981). Ethics. New York: Seabury Press.
Chicago
Barth Karl, Braun Dietrich, . 1981. Ethics. New York: Seabury Press.
Harvard
Barth K., Braun D., . (1981). Ethics. New York: Seabury Press.
MLA
Barth Karl, Braun Dietrich, . Ethics. New York: Seabury Press. 1981.