Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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