Lawrence, N. M. (1968). Whitehead's philosophical development: A critical history of the background of Process and reality. Greenwood Press.
Lua i Stíl Chicago (17ú heag.)Lawrence, Nathaniel Morris. Whitehead's Philosophical Development: A Critical History of the Background of Process and Reality. New York,: Greenwood Press, 1968.
Lua MLA (8ú heag.)Lawrence, Nathaniel Morris. Whitehead's Philosophical Development: A Critical History of the Background of Process and Reality. Greenwood Press, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.