Cita APA

International Congress of Mathematicians Helsinki, F., & Lehto, O. (1980). Proceedings of the International Congress of Mathematicians: Helsinki 1978. Academia Scientarum Fennica?].

Citación estilo Chicago

International Congress of Mathematicians Helsinki, Finlandia), and Olli Lehto. Proceedings of the International Congress of Mathematicians: Helsinki 1978. [Helsinki: Academia Scientarum Fennica?], 1980.

Cita MLA

International Congress of Mathematicians Helsinki, Finlandia), and Olli Lehto. Proceedings of the International Congress of Mathematicians: Helsinki 1978. [Helsinki: Academia Scientarum Fennica?], 1980.