↑ "Newton named seven colors in the spectrum: red, orange, yellow, green, blue, indigo, and violet. More commonly today we only speak of six major divisions, leaving out indigo. A careful reading of Newton’s work indicates that the color he called indigo, we would normally call blue; his blue is then what we would name blue-green or cyan."[6]
1 2 Waldman, Gary (1983). Introduction to Light: The Physics of Light, Vision, and Color (2002 revised ed.). Mineola, New York: Dover Publications. p. 193. ISBN978-0486421186.
↑ "New Rochelle, NY-Points of Interest". The History Box. May 22, 2012. คลังข้อมูลเก่า เก็บจาก แหล่งเดิม เมื่อ 2016-03-03. สืบค้นเมื่อ 2021-06-10. (Transcription of New York—A Guide to the Empire State page.)
