APA (7th ed.) Citation

Roberts, U., & Adams, A. (1976). Letters between healers. Psychic Press.

Chicago Style (17th ed.) Citation

Roberts, Ursula, and Audrey Adams. Letters Between Healers. London: Psychic Press, 1976.

MLA (8th ed.) Citation

Roberts, Ursula, and Audrey Adams. Letters Between Healers. Psychic Press, 1976.