APA (7. basım) Alıntı

Helmer, O. (1970). Report on the future of future-state-of-the-union reports. Inst. for the Future.

Chicago Style (17. basım) Atıf

Helmer, Olaf. Report on the Future of Future-state-of-the-union Reports. Middletown, Conn.: Inst. for the Future, 1970.

MLA (8th ed.) Atıf

Helmer, Olaf. Report on the Future of Future-state-of-the-union Reports. Inst. for the Future, 1970.