Librería Samer Atenea
Librería Aciertas (Toledo)
Kálamo Books
Librería Perelló (Valencia)
Librería Elías (Asturias)
Donde los libros
Librería Kolima (Madrid)
Librería Proteo (Málaga)
With the advent of desktop publishing systems and user-friendly computer software, there is an increasing trend for educators and trainers to produce their own instructional material. This study provides guidelines for the design of basic, sound and unconfusing instructional diagrams.