Gaya APA

makridakis, S. et al (1983). forecasting : methods and applications/2nd ed. (2). Singapore: JOHN WILEY & SONS ,INC.

Gaya MLA

makridakis, Spyros. et al. "forecasting : methods and applications/2nd ed.". 2 Singapore: JOHN WILEY & SONS ,INC, 1983. Text.