Παραπομπή σε μορφή APA (7η εκδ.)

Leiss, E., & Abraham, W. (2014). Modes of modality: Modality, typology, and universal grammar. John Benjamins Publishing Company.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Leiss, Elisabeth, και Werner Abraham. Modes of Modality: Modality, Typology, and Universal Grammar. Amsterdam: John Benjamins Publishing Company, 2014.

Παραπομπή σε μορφή MLA (9th εκδ.)

Leiss, Elisabeth, και Werner Abraham. Modes of Modality: Modality, Typology, and Universal Grammar. John Benjamins Publishing Company, 2014.