Citazione Stile APA (7a Edizione)

Clark, A. M. (1947). Spoken English: An idiomatic grammar for foreign students (2a. ed.). Oliver and Boyd.

Citazione stile Chigago Style (17a edizione)

Clark, Arthur Melville. Spoken English: An Idiomatic Grammar for Foreign Students. 2a. ed. Londres: Oliver and Boyd, 1947.

Citatione MLA (9a ed.)

Clark, Arthur Melville. Spoken English: An Idiomatic Grammar for Foreign Students. 2a. ed. Oliver and Boyd, 1947.