Cita APA (7a ed.)

Swan, T., & Westvik, O. J. (1997). Modality in Germanic languages: Historical and comparative perspectives. Mouton de Gruyter.

Cita Chicago Style (17a ed.)

Swan, Toril, y Olaf Jansen Westvik. Modality in Germanic Languages: Historical and Comparative Perspectives. Berlin ; New York: Mouton de Gruyter, 1997.

Cita MLA (8a ed.)

Swan, Toril, y Olaf Jansen Westvik. Modality in Germanic Languages: Historical and Comparative Perspectives. Mouton de Gruyter, 1997.