APA (7th ed.) Citation

Nuttall, C. E., & Gaist, J. (1968). Must, need and have to (1. publ.). Longman.

Chicago Style (17th ed.) Citation

Nuttall, C. E., and J. Gaist. Must, Need and Have to. 1. publ. London: Longman, 1968.

MLA (9th ed.) Citation

Nuttall, C. E., and J. Gaist. Must, Need and Have to. 1. publ. Longman, 1968.