By Scheaffer, Richard L..
Madrid : Thomson, 2006 .
462 p.; 24 cm. , Incluye bibliografía. 8497324935

By Ward, John.
Bogotá : Norma, 2006 .
246 p. ; 23 cm. 9580493200

By Landreth, Harry.
Madrid : McGraw Hill, 2006 .
517 p. ; 24 cm. 8448150252

By Martin Pliego, F.Javier.
Australia : Thomson, 2006 .
285 p. ; 24 cm. 849732501X

By Ambieni, Valeria Virginia.
Buenos Aires ERREPAR 2006 .
99 p. : 27 cm. 9870105521