APA (7e ed.) Bronvermelding

Isard, W., & Smith, T. E. (1969). General theory: Social, political, economic, and regional, with particular reference to decision-making analysis. M.I.T. Press.

Chicago (17e ed.) Bronvermelding

Isard, Walter, en Tony E. Smith. General Theory: Social, Political, Economic, and Regional, with Particular Reference to Decision-making Analysis. Cambridge, Mass: M.I.T. Press, 1969.

MLA (9e ed.) Bronvermelding

Isard, Walter, en Tony E. Smith. General Theory: Social, Political, Economic, and Regional, with Particular Reference to Decision-making Analysis. M.I.T. Press, 1969.