Cita APA (7a ed.)

Laird, H. a. C., & Metzl, E. (1966). The tree of language (1. ed.). Faber and Faber.

Cita Chicago Style (17a ed.)

Laird, Helene and Charlton, y Ervine Metzl. The Tree of Language. 1. ed. London: Faber and Faber, 1966.

Cita MLA (8a ed.)

Laird, Helene and Charlton, y Ervine Metzl. The Tree of Language. 1. ed. Faber and Faber, 1966.