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