APA-ийн эшлэл(7 дахь хэвлэлт)

Hardwick, P., & Langmead, J. a. K. B. (1999). An Introduction to modern economics (5th ed.). Prentice Hall.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Hardwick, Philip, ба John and Khan Bhadur Langmead. An Introduction to Modern Economics. 5th ed. Harlow, England: Prentice Hall, 1999.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Hardwick, Philip, ба John and Khan Bhadur Langmead. An Introduction to Modern Economics. 5th ed. Prentice Hall, 1999.