Heyderman, Emma
Dörnyei, Zoltán; Kubanyiova, Magdalena
Taylor, Lynda
I. S. P. Nation
Barkhuizen, Gary
Weir, Cyril J.; Galaczi, Evelina D.; Vidakovic, Ivana
Varios Autores
Thornbury, Scott; Stanley, Graham
Redman, Stuart; Ellis, Robert; Viney, Brigit; Mark, Geraldine
Hawkey, Roger A.; Milanovic, Michael
Geranpayeh, Ardeshir; Taylor, Lynda
Arnold, Jane; Murphey, Tim