Bahá'u'lláh. (1978). The seven valleys and The four valleys. Wilmette, Ill: Bahá'í Publishing Trust.
Stile di citazione ChicagoBahá'u'lláh. The Seven Valleys and The Four Valleys. Wilmette, Ill: Bahá'í Publishing Trust, 1978.
Citazione MLABahá'u'lláh. The Seven Valleys and The Four Valleys. Wilmette, Ill: Bahá'í Publishing Trust, 1978.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.