Moore, Patrick
The planet venus
Macmillan, 1958
 Buku Teks
Sagan, Carl, author
Planets
Time Incorporated, 1966
 Buku Referensi
Moore, Patrick, author
A guide to the planets
W.W. Norton & Co., 1954
 Buku Referensi
Lewis, C.S., author
Out of the silent planet
Macmillan, 1947
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Lewis, John S., author
Worlds without end : the exploration of planets known and unknown
Helix Books, 1998
 Buku Teks
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