Stephen R. Covey, Grijalbo

$9.41

Tito Balza Santaella, Jose Rafael Parra

$17.74

V. Bote- Ma. Such -l. Esc, Mc Graw Hill

$39.80

Mikecrack - Trollino, Mr

$21.54

Walter Riso, Planeta

$12.00

$12.63

Carmen Martinez Nuñez, Mr

$4.06

Adel Norman, San Pablo

$3.00

Cesar Uribe Piedrahita, Unica

$7.57

$4.20

$7.74

Lucy Amado, Lucy Amado

$12.76

Walter Riso, Planeta

$12.00

Adam J. Jackson, Sirio

$7.20

$7.20