Cita APA (7a ed.)

Bybee, J. L., & Fleischman, S. (1995). Modality in grammar and discourse. J. Benjamins.

Cita Chicago Style (17a ed.)

Bybee, Joan L., y Suzanne Fleischman. Modality in Grammar and Discourse. Amsterdam ; Philadelphia: J. Benjamins, 1995.

Cita MLA (8a ed.)

Bybee, Joan L., y Suzanne Fleischman. Modality in Grammar and Discourse. J. Benjamins, 1995.