ʻAbdu'l-Bahá. The Secret of Divine Civilization.
Chicago-čujuhus (17. p.)ʻAbdu'l-Bahá. The Secret of Divine Civilization.
MLA-čujuhus (9. p.)ʻAbdu'l-Bahá. The Secret of Divine Civilization.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.