Cita APA (7th ed.)
Swan, T., & Westvik, O. J. (1997). Modality in Germanic languages: Historical and comparative perspectives. Mouton de Gruyter.
Cita Chicago (17th ed.)
Swan, Toril, i Olaf Jansen Westvik. Modality in Germanic Languages: Historical and Comparative Perspectives. Berlin ; New York: Mouton de Gruyter, 1997.
Cita MLA (9th ed.)
Swan, Toril, i Olaf Jansen Westvik. Modality in Germanic Languages: Historical and Comparative Perspectives. Mouton de Gruyter, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.