Shaffer, Rick
Your guide to the sky
Lowell House, 1999
Buku Referensi
Craghan, Michael
Physical geography: a self-teaching guide
John Wiley & Sons, 2003
Buku Teks
Kuhn, Karl F.
Basic physics : a self-teaching guide
John Wiley & Sons, 1979
Buku Teks
Warhus, Susan
Fertility demystified : a self teaching guide
McGraw-Hill, 2007
Buku Teks
Cavin, Jerry D.
The amateur astronomer’s guide to the deep-sky catalogs
Springer, 2012
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