Spear, R. (1976). Hixan analysis: Catastrophe and its preconditions TD342 2/3&4. Open University Press.
Chicago Edition CitationSpear, Roger. Hixan Analysis: Catastrophe and Its Preconditions TD342 2/3&4. Open University Press, 1976.
Cita MLASpear, Roger. Hixan Analysis: Catastrophe and Its Preconditions TD342 2/3&4. Open University Press, 1976.
Atenció: Aquestes cites poden no estar 100% correctes.