อ้างอิง ของ รากที่_n

  1. ↑ Bansal, R K (2006). New Approach to CBSE Mathematics IX. Laxmi Publications. p. 25. ISBN 9788131800133.
  2. ↑ Silver, Howard A. (1986). Algebra and trigonometry. Englewood Cliffs, N.J.: Prentice-Hall. ISBN 0130212709.
  3. ↑ Leonhard Euler (1755). Institutiones calculi differentialis (in Latin).CS1 maint: unrecognized language (link)