Robert J. Schadewald. "The Flat-out Truth". Lhup.edu. Diarsipkan dari versi asli tanggal 2013-01-28. Diakses tanggal 2009-06-15.
mit.edu
classics.mit.edu
Plato, TimaeusDiarsipkan 2012-05-01 di Wayback Machine.. c. 360 BC. "Wherefore he made the world in the form of a globe, round as from a lathe, having its extremes in every direction equidistant from the centre, the most perfect and the most like itself of all figures..."
Author(s): John R. Cole, Contributing Editor (2001). "Flat Earth Society President Dies | NCSE". National Center for Science Education. Diakses tanggal 2009-06-15.Pemeliharaan CS1: Banyak nama: authors list (link) Pemeliharaan CS1: Teks tambahan: authors list (link)
Voliva, Wilbur Glenn (1979). "Is the Earth a Whirling Globe?"(PDF). Flat Earth News. Lancaster, CA: International Flat Earth Research Society. hlm. 2. Diakses tanggal April 23, 2014.Parameter |month= yang tidak diketahui akan diabaikan (bantuan)
Johnson, Charles K. (1978). "News of the World's Children"(PDF). Flat Earth News. Lancaster, CA: International Flat Earth Research Society. hlm. 2. Diakses tanggal April 23, 2014.Parameter |month= yang tidak diketahui akan diabaikan (bantuan)
Johnson, Charles K. (1978). "Sun is a Light 32 Miles Across"(PDF). Flat Earth News. Lancaster, CA: International Flat Earth Research Society. hlm. 1. Diakses tanggal April 23, 2014.Parameter |month= yang tidak diketahui akan diabaikan (bantuan)
"UNB Archives". Diakses tanggal 2010.Periksa nilai tanggal di: |accessdate= (bantuan)
web.archive.org
Plato, TimaeusDiarsipkan 2012-05-01 di Wayback Machine.. c. 360 BC. "Wherefore he made the world in the form of a globe, round as from a lathe, having its extremes in every direction equidistant from the centre, the most perfect and the most like itself of all figures..."
Robert J. Schadewald. "The Flat-out Truth". Lhup.edu. Diarsipkan dari versi asli tanggal 2013-01-28. Diakses tanggal 2009-06-15.