Robinson, A. H., & Sale, R. D. (1969). Elements of cartography (3d ed.). Wiley.
Lua i Stíl Chicago (17ú heag.)Robinson, Arthur Howard, agus Randall D. Sale. Elements of Cartography. 3d ed. New York: Wiley, 1969.
Lua MLA (9ú heag.)Robinson, Arthur Howard, agus Randall D. Sale. Elements of Cartography. 3d ed. Wiley, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.