Cita APA (7a ed.)

Elliott, C. A. (1990). Biographical index to American science: The seventeenth century to 1920. Greenwood Press.

Cita Chicago Style (17a ed.)

Elliott, Clark A. Biographical Index to American Science: The Seventeenth Century to 1920. New York [etc.]: Greenwood Press, 1990.

Cita MLA (9a ed.)

Elliott, Clark A. Biographical Index to American Science: The Seventeenth Century to 1920. Greenwood Press, 1990.