1. ‘Abdu’l-Bahá. (1972). Paris talks (11th Ed.). UK Bahá’í Publishing Trust, reprint.
2. ‘Abdu’l-Bahá. (1979). Foundations of world unity. US Baha'i Publishing Trust.
3. ‘Abdu’l-Bahá. (1982a). ‘Abdu’l-Bahá in London. UK Baha'i Publishing Trust.
4. ‘Abdu’l-Bahá. (1982b). Selections from the writings of ‘Abdu’l-Bahá. Baha’i World Centre.
5. ‘Abdu’l-Bahá. (1990a). Some answered questions. US Baha'i Publishing Trust.