Citazione Stile APA (7a Edizione)

Knapp, K., Siedlhofer, B., & Widdowson, H. (2009). Handbook of foreign language communication and learning (1a. ed.). Walter de Gruyter.

Citazione stile Chigago Style (17a edizione)

Knapp, Karlfried, Barbara Siedlhofer, e Henry Widdowson. Handbook of Foreign Language Communication and Learning. 1a. ed. Berlín: Walter de Gruyter, 2009.

Citatione MLA (9a ed.)

Knapp, Karlfried, et al. Handbook of Foreign Language Communication and Learning. 1a. ed. Walter de Gruyter, 2009.