APA (7th ed.) Citation

Redmill, F., & Valdar, A. R. (1990). SPC digital telephone exchanges / F. J. Redmill and A. R. Valdar. Peregrinus on behalf of the Institution of Electrical Engineers.

Chicago Style (17th ed.) Citation

Redmill, Felix, and A. R. Valdar. SPC Digital Telephone Exchanges / F. J. Redmill and A. R. Valdar. London: Peregrinus on behalf of the Institution of Electrical Engineers, 1990.

MLA (9th ed.) Citation

Redmill, Felix, and A. R. Valdar. SPC Digital Telephone Exchanges / F. J. Redmill and A. R. Valdar. Peregrinus on behalf of the Institution of Electrical Engineers, 1990.

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