Cita APA (7a ed.)
Marshall, R. K., & Gnagy, J. (1951). The Nature of things: Illustr. by John Gnagy. Holt.
Cita Chicago Style (17a ed.)
Marshall, Roy Kenneth, y John Gnagy. The Nature of Things: Illustr. by John Gnagy. New York: Holt, 1951.
Cita MLA (9a ed.)
Marshall, Roy Kenneth, y John Gnagy. The Nature of Things: Illustr. by John Gnagy. Holt, 1951.
Precaución: Estas citas no son 100% exactas.