APA (7th ed.) Citation

Wheldon, H. J., & Thirkettle, G. L. (1981). Wheldon's Business statistics and statistical method (9th ed.). Pitman Pub..

Chicago Style (17th ed.) Citation

Wheldon, Harold J., and George Leslie Thirkettle. Wheldon's Business Statistics and Statistical Method. 9th ed. London: Pitman Pub., 1981.

MLA (8th ed.) Citation

Wheldon, Harold J., and George Leslie Thirkettle. Wheldon's Business Statistics and Statistical Method. 9th ed. Pitman Pub., 1981.