APA-ийн эшлэл(7 дахь хэвлэлт)

Harford, T. (2010). Dear Under Cover Economist: The very best Letters from the 'Dear Economist' Column. Littele Brown.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Harford, Tim. Dear Under Cover Economist: The Very Best Letters from the 'Dear Economist' Column. Londn: Littele Brown, 2010.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Harford, Tim. Dear Under Cover Economist: The Very Best Letters from the 'Dear Economist' Column. Littele Brown, 2010.