APA-ийн эшлэл(7 дахь хэвлэлт)

Gerken, H. K. (2009). The democracy index: Why our election system is failing and how to fix it. Princeton University Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Gerken, Heather K. The Democracy Index: Why Our Election System Is Failing and How to Fix It. Princeton: Princeton University Press, 2009.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Gerken, Heather K. The Democracy Index: Why Our Election System Is Failing and How to Fix It. Princeton University Press, 2009.