Lewis, John S., author
Helix Books, 1998
Buku Teks
Jones, H. Spencer, author
Macmillan, 1956
Buku Teks
Kitchin, Chris, author
[Springer, ], 2012
eBooks
Sagan, Carl, author
Time Incorporated, 1966
Buku Referensi
Moore, Patrick, author
W.W. Norton & Co., 1954
Buku Referensi