Motivation : theories and principles /
Beck, Robert Clarence
Motivation : theories and principles / Robert C. Beck. - Englewood Cliffs (E.U.A.) : Prentice-Hall, 1978. - 470 p. : il.
0136039022
Motivación (Psicología)
Motivation : theories and principles / Robert C. Beck. - Englewood Cliffs (E.U.A.) : Prentice-Hall, 1978. - 470 p. : il.
0136039022
Motivación (Psicología)