Shaffer, Rick
Your guide to the sky
Lowell House, 1999
Buku Referensi
Warhus, Susan
Fertility demystified : a self teaching guide
McGraw-Hill, 2007
Buku Teks SO
Kuhn, Karl F.
Basic physics : a self-teaching guide
John Wiley & Sons, 1979
Buku Teks SO
Tagliaferri, Louis E.
Successful supervision : a self-teaching guide
John Wiley & Sons, 1979
Buku Teks
Craghan, Michael
Physical geography: a self-teaching guide
John Wiley & Sons, 2003
Buku Teks SO