Sacks, D. H. (1991). The widening gate: Bristol and the Atlantic economy, 1450-1700. University of California Press.
芝加哥风格引文Sacks, David Harris. The Widening Gate: Bristol and the Atlantic Economy, 1450-1700. Berkeley: University of California Press, 1991.
MLA引文Sacks, David Harris. The Widening Gate: Bristol and the Atlantic Economy, 1450-1700. University of California Press, 1991.
警告：这些引文格式不一定是100％准确.