APA-ийн эшлэл(7 дахь хэвлэлт)

kaufman, J. (2013). The first 20 hours: How to learn anything fast. Portfolio Penguin.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

kaufman, Josh. The First 20 Hours: How to Learn Anything Fast. London: Portfolio Penguin, 2013.

MLA -ийн эшлэл (9 дэх хэвлэлт)

kaufman, Josh. The First 20 Hours: How to Learn Anything Fast. Portfolio Penguin, 2013.