APA (7th ed.) Citation

Roy Porter & E.J. Browne. (1981). Dictionary of the history of science. Macmillan.

Chicago Style (17th ed.) Citation

Roy Porter and E.J. Browne. Dictionary of the History of Science. London: Macmillan, 1981.

MLA (9th ed.) Citation

Roy Porter and E.J. Browne. Dictionary of the History of Science. Macmillan, 1981.