APA-ийн эшлэл(7 дахь хэвлэлт)
Freeman, C., & Louçã, F. (2001). As time goes by: From the industrial revolutions to the information revolution. Oxford University Press.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)
Freeman, Christopher, ба Francisco Louçã. As Time Goes by: From the Industrial Revolutions to the Information Revolution. Oxford ; New York: Oxford University Press, 2001.
MLA -ийн эшлэл (9 дэх хэвлэлт)
Freeman, Christopher, ба Francisco Louçã. As Time Goes by: From the Industrial Revolutions to the Information Revolution. Oxford University Press, 2001.
Анхааруулга: Эдгээр ишлэлүүд үргэлж 100% үнэн зөв биш байж магадгүй.