Gaya APA

Bails, D, G., Peppers, L, C. (1993). Business fluctuations : forecasting techniques and applications . Englewood Cliffs, NJ: Prentice Hall.

Gaya MLA

Bails, Dale, G.., Peppers, Larry, C.. "Business fluctuations : forecasting techniques and applications". Englewood Cliffs, NJ: Prentice Hall, 1993. Text.