APA (7th ed.) Citation

Heard, G. (1947). Doppelgangers: An episode of the fourth, the psychological, revolution, 1997. The Vanguard press.

Chicago Style (17th ed.) Citation

Heard, Gerald. Doppelgangers: An Episode of the Fourth, the Psychological, Revolution, 1997. New York: The Vanguard press, 1947.

MLA (9th ed.) Citation

Heard, Gerald. Doppelgangers: An Episode of the Fourth, the Psychological, Revolution, 1997. The Vanguard press, 1947.