Barney, Laura Clifford; Baṭ, ʻAbbās ʻAlī (1955) Mufāvẓāt ʻAbd al-Bahā: guftugū bar sar-i nāhār. Maḥfil-i Muqaddas Rūḥānī Millī Bahā'iyāṉ. ISBN: .