Volksalmanak Soenda III, 1921
Published by Bale Pustaka (Balai Pustaka)
Digital copies contributed by Ganjar Kurnia/Lopian, Pusat Digitalisasi dan Pengembangan Budaya Sunda, Universitas Padjadjaran (<a rel="nofollow" class="external free" href="https://lopian.unpad.ac.id/">https://lopian.unpad.ac.id/</a>) given to <a href="//commons.wikimedia.org/wiki/User:Hayati_Mayang_Arum" title="User:Hayati Mayang Arum">user:Hayati Mayang Arum</a>.