"Wayback Machine"(PDF). web.archive.org. 2011-04-17. Archived from the original on 2011-04-17. Diakses tanggal 2023-02-08.Pemeliharaan CS1: Url tak layak (link)
"Wayback Machine"(PDF). web.archive.org. 2012-10-08. Archived from the original on 2012-10-08. Diakses tanggal 2023-02-08.Pemeliharaan CS1: Url tak layak (link)
"Wayback Machine"(PDF). web.archive.org. 2012-10-08. Archived from the original on 2012-10-08. Diakses tanggal 2023-02-08.Pemeliharaan CS1: Url tak layak (link)