Parker, Steve
Miles Kelly, 2000
Buku Referensi
edited by R.S.K. Barnes and K.H. Mann
Blackwell, 1991
Buku Teks
Sisilia Heyden
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2018
UI - Skripsi Membership
edited by A.P.M. Lockwood
Cambridge University Press, 1976
Buku Teks
edited by Alf Hornborg and Carole L. Crumley
Left Coast Press, 2007
Buku Teks