Kübler, S. (1991). Mapping the learner's world: Exploring students' perspectives on learning English as a foreign language. Zentralstelle der Studentenschaft.
Chicago-referens (17:e uppl.)Kübler, Silvia. Mapping the Learner's World: Exploring Students' Perspectives on Learning English as a Foreign Language. Zürich: Zentralstelle der Studentenschaft, 1991.
MLA-referens (8:e uppl.)Kübler, Silvia. Mapping the Learner's World: Exploring Students' Perspectives on Learning English as a Foreign Language. Zentralstelle der Studentenschaft, 1991.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.