Gaya APA

Bertalanffy, L, V. (1973). General system theory, foundations development applications, [repr. ed.]. Cet.pertama 1968. . [Harmondsworth]: Penguin Books.

Gaya MLA

Bertalanffy, Ludwig, Von.. "General system theory, foundations development applications, [repr. ed.]. Cet.pertama 1968. ". [Harmondsworth]: Penguin Books, 1973. Buku.