Spherical Harmonics and Approximations on the Unit Sphere: An Introduction
  MLA
  Atkinson, Kendall, and Weimin Han. Spherical Harmonics and Approximations On the Unit Sphere: An Introduction. Springer Berlin Heidelberg, 2012.
  APA
  Atkinson, K., & Han, W. (2012). Spherical Harmonics and Approximations on the Unit Sphere: An Introduction. Springer Berlin Heidelberg.
  Chicago
  Atkinson, Kendall, and Weimin Han. Spherical Harmonics and Approximations On the Unit Sphere: An Introduction. : Springer Berlin Heidelberg, 2012.