Nielsen, N. C. (1991). Revolutions in Eastern Europe: The religious roots. Orbis Books.
芝加哥风格引文Nielsen, Niels C. Revolutions in Eastern Europe: The Religious Roots. Maryknoll, N.Y: Orbis Books, 1991.
MLA引文Nielsen, Niels C. Revolutions in Eastern Europe: The Religious Roots. Orbis Books, 1991.
警告：这些引文格式不一定是100％准确.