APA (7th ed.) Zitazioa

Kupka, I. (1981). Introduction to the theory of systems. Ministerio da Ciencia e Tecnologia.

Chicago Style (17th ed.) Zitazioa

Kupka, Iván. Introduction to the Theory of Systems. Río de Janeiro: Ministerio da Ciencia e Tecnologia, 1981.

MLA (9th ed.) Zitazioa

Kupka, Iván. Introduction to the Theory of Systems. Ministerio da Ciencia e Tecnologia, 1981.