Lowith, Karl, author
Routledge, 1993
Buku Teks
Lerner, Max, author
Simon and Shuster, 1962
Buku Teks
Max
Sampson Low, Marston, 1900
Buku Teks
Lerner, Max, author
Simon and Schuster, 1957
Buku Teks
Nasution, Astri D. J., author
Universitas Indonesia, 2004
UI - Skripsi (Membership)