Coba jelasin Lihat juga dari Unjuran Robinson dalam bahasa melayu dong

Winkel Tripel — unjuran yang sedang digunakan oleh National Geographic.

Arthur Robinson (1974). "A New Map Projection: Its Development and Characteristics". Dalam: International Yearbook of Cartography. Vol 14, 1974, m/s. 145–155.

John B. Garver Jr. (1988). "New Perspective on the World". Dalam: National Geographic, December 1988, m/s. 911–913.

John P. Snyder (1993). Flattening The Earth—2000 Years of Map Projections, The University of Chicago Press. m/s. 214–216.