APA (7th ed.) Citation

Olby, R. C. (1967). Early nineteenth century European scientists. Pergamon Press.

Chicago Style (17th ed.) Citation

Olby, R. C. Early Nineteenth Century European Scientists. Oxford, UK: Pergamon Press, 1967.

MLA (9th ed.) Citation

Olby, R. C. Early Nineteenth Century European Scientists. Pergamon Press, 1967.