APA (7th ed.) Citation

Farthing, G. A. (1967). Theosophy: What's it all about? Theosophical Publishing House.

Chicago Style (17th ed.) Citation

Farthing, Geoffrey A. Theosophy: What's It All About? London, Wheaton, Ill. [etc.]: Theosophical Publishing House, 1967.

MLA (9th ed.) Citation

Farthing, Geoffrey A. Theosophy: What's It All About? Theosophical Publishing House, 1967.