APA (7th ed.) Citation

Frauenfelder, U., Rizzi, L., & Zesiger, P. (2008). Preface. Language & Speech, 51(1/2), 1. https://doi.org/10.1177/00238309080510010101

Chicago Style (17th ed.) Citation

Frauenfelder, Ulrich, Luigi Rizzi, and Pascal Zesiger. "Preface." Language & Speech 51, no. 1/2 (2008): 1. https://doi.org/10.1177/00238309080510010101.

MLA (9th ed.) Citation

Frauenfelder, Ulrich, et al. "Preface." Language & Speech, vol. 51, no. 1/2, 2008, p. 1, https://doi.org/10.1177/00238309080510010101.