APA (7th ed.) Citation

Johnstone, K. (1979). Impro : improvisation and the theatre / (by) Keith Johnstone ; with an introduction by Irving Wardle: Improvisation and the theatre. Faber.

Chicago Style (17th ed.) Citation

Johnstone, Keith. Impro : Improvisation and the Theatre / (by) Keith Johnstone ; with an Introduction by Irving Wardle: Improvisation and the Theatre. London (etc.): Faber, 1979.

MLA (9th ed.) Citation

Johnstone, Keith. Impro : Improvisation and the Theatre / (by) Keith Johnstone ; with an Introduction by Irving Wardle: Improvisation and the Theatre. Faber, 1979.

Warning: These citations may not always be 100% accurate.