APA-referens (7:e uppl.)

Johnstone, K. (2019). Impro: Improvisation and the theatre. Bloomsbury Academic.

Chicago-referens (17:e uppl.)

Johnstone, Keith. Impro: Improvisation and the Theatre. London ; New York: Bloomsbury Academic, 2019.

MLA-referens (9:e uppl.)

Johnstone, Keith. Impro: Improvisation and the Theatre. Bloomsbury Academic, 2019.