APA
Hardwick P., Langmead J. a. K. B., . (1999). An Introduction to modern economics. Harlow, England: Prentice Hall.
Chicago
Hardwick Philip, Langmead John and Khan Bhadur, . 1999. An Introduction to modern economics. Harlow, England: Prentice Hall.
Harvard
Hardwick P., Langmead J. a. K. B., . (1999). An Introduction to modern economics. Harlow, England: Prentice Hall.
MLA
Hardwick Philip, Langmead John and Khan Bhadur, . An Introduction to modern economics. Harlow, England: Prentice Hall. 1999.