APA

Steiner R., Betteridge B. D. & Dawson F. E. (1984). The cycle of the year as breathing-process of the earth: five lectures given in Dornach 31 March to 8 April, 1923. Spring Valley, N.Y: Anthroposophic Press.

Chicago

Steiner Rudolf, Betteridge Barbara D and Dawson Frances E. 1984. The cycle of the year as breathing-process of the earth: five lectures given in Dornach 31 March to 8 April, 1923. Spring Valley, N.Y: Anthroposophic Press.

Harvard

Steiner R., Betteridge B. D. and Dawson F. E. (1984). The cycle of the year as breathing-process of the earth: five lectures given in Dornach 31 March to 8 April, 1923. Spring Valley, N.Y: Anthroposophic Press.

MLA

Steiner Rudolf, Betteridge Barbara D and Dawson Frances E. The cycle of the year as breathing-process of the earth: five lectures given in Dornach 31 March to 8 April, 1923. Spring Valley, N.Y: Anthroposophic Press. 1984.