Kübler, S. (1991). Mapping the learner's world: Exploring students' perspectives on learning English as a foreign language. Zentralstelle der Studentenschaft.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKübler, Silvia. Mapping the Learner's World: Exploring Students' Perspectives on Learning English as a Foreign Language. Zürich: Zentralstelle der Studentenschaft, 1991.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKübler, Silvia. Mapping the Learner's World: Exploring Students' Perspectives on Learning English as a Foreign Language. Zentralstelle der Studentenschaft, 1991.
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