Weber, Max, 1864-1920, author
University of California press, 1978
Buku Teks
Khairuddi H
Liberty Yogyakarta, 1992
Buku Teks
Alatas
LP3S, 1988
Buku Teks
Oman Sukmana, author
Universitas Muhammadiyah, 2005
Buku Teks
Mohammad Hatta, 1902-1980, author
Djambatan, 1967
Buku Teks