Muirden, James
The amateur astronomer's handbook
Crowell, 1968
Buku Referensi
A field guide to deep-sky objects / Michael D. Inglis
Springer, 2012
eBooks
Aranda, Ted
3,000 deep-sky objects : an annotated catalogue
Springer, 2012
eBooks
Nelson, Bonnie R.
A guide to published library catalogs / Bonnie R. Nelson
Scarecrow Press, 1982
Buku Referensi
Wilkinson, John
New eyes on the sun : a guide to satellite images and amateur observation
Springer, 2012
eBooks