APA (7th ed.) Citation

Whittaker, E. T. (1944). The calculus of observations: A treatise on numerical mathematics. Blackie & Son Limited.

Chicago Style (17th ed.) Citation

Whittaker, Edmund Taylor. The Calculus of Observations: A Treatise on Numerical Mathematics. London: Blackie & Son Limited, 1944.

MLA (9th ed.) Citation

Whittaker, Edmund Taylor. The Calculus of Observations: A Treatise on Numerical Mathematics. Blackie & Son Limited, 1944.