APA (7. basım) Alıntı

Helmer, O. (1969). Development of long-range forecasting methods for Connecticut: A summary. Inst. for the Future.

Chicago Style (17. basım) Atıf

Helmer, Olaf. Development of Long-range Forecasting Methods for Connecticut: A Summary. Middletown, Conn.: Inst. for the Future, 1969.

MLA (8th ed.) Atıf

Helmer, Olaf. Development of Long-range Forecasting Methods for Connecticut: A Summary. Inst. for the Future, 1969.