APA-ийн эшлэл(7 дахь хэвлэлт)

Sacks, D. H. (1991). The widening gate: Bristol and the Atlantic economy, 1450-1700. University of California Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Sacks, David Harris. The Widening Gate: Bristol and the Atlantic Economy, 1450-1700. Berkeley: University of California Press, 1991.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Sacks, David Harris. The Widening Gate: Bristol and the Atlantic Economy, 1450-1700. University of California Press, 1991.