APA (7th ed.) Citation

Borchardt, W. G., & Perrott, A. D. (1923). A new trigonometry for schools. G. Bell and Sons.

Chicago Style (17th ed.) Citation

Borchardt, W. G., and A. D. Perrott. A New Trigonometry for Schools. London: G. Bell and Sons, 1923.

MLA (9th ed.) Citation

Borchardt, W. G., and A. D. Perrott. A New Trigonometry for Schools. G. Bell and Sons, 1923.

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