Niebuhr, Reinhold, author
Nisbet, 1947
Buku Teks
Niebuhr, Reinhold, author
Nisbet & Co., 1946
Buku Teks
Niebuhr, Reinhold, author
Charles Scribner's Sons, 1949
Buku Teks
Kyoung, Bae-min 1934-, author
Yonsei University Press , 2005
Buku Teks
Beasley, Norman
Buell, Sloan and Pearce, 1952
Buku Teks