APA
Balthasar H. U. v., . (1961). Prayer. London: Geoffrey Chapman.
Chicago
Balthasar Hans Urs von, . 1961. Prayer. London: Geoffrey Chapman.
Harvard
Balthasar H. U. v., . (1961). Prayer. London: Geoffrey Chapman.
MLA
Balthasar Hans Urs von, . Prayer. London: Geoffrey Chapman. 1961.
