Formby, J. (1965). An introduction to the mathematical formulation of self-organizing systems. N.J., Van Nostrand.
Cita Chicago (17th ed.)Formby, John. An Introduction to the Mathematical Formulation of Self-organizing Systems. Princeton: N.J., Van Nostrand, 1965.
Cita MLA (9th ed.)Formby, John. An Introduction to the Mathematical Formulation of Self-organizing Systems. N.J., Van Nostrand, 1965.
Atenció: Aquestes cites poden no estar 100% correctes.