Librería Samer Atenea
Kálamo Books
Librería Elías (Asturias)
Librería Kolima (Madrid)
Librería Proteo (Málaga)
I would like to thank everyone who contributed to this research, especially: Professor Ricardo de Carvalho Costa for his patience and tolerance in providing guidance; the university students for sharing their perceptions about the phenomenon studied; my parents for their education, respect and unconditional support; my friend and partner Lydia Pires for her understanding, dedication and help during the most significant moments of this work.