National Geographic Book Service.
National Geographic Society, 1987
Buku Referensi
Ritchie, Donald A., author
Macmillan, 1985
Buku Teks
Wilson, Ross J., 1981-, author
Taylor & Francis Group, 2018
Buku Teks
Bloembergen, Marieke, author
Cambridge University Press, 2020
eBooks
Kyung Hee Univesity Press, 2007
Buku Teks