Titchmarsh, E, C.
Chelsea Publishing Company, 1990
Buku Teks
Bloomfield, Peter
John Wiley & Sons, 1976
Buku Teks
Brown, James Ward, 1934-
McGraw-Hill, 2012
Buku Teks
Brown, James Ward, 1934-
McGraw-Hill, 2012
Buku Teks
Tyastuti Sri Lestari
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 1992
UI - Skripsi (Membership)