APA (7th ed.) Citation

Lovins, A. B. (1977). Soft energy paths: Toward a durable peace. Penguin.

Chicago Style (17th ed.) Citation

Lovins, Amory B. Soft Energy Paths: Toward a Durable Peace. Harmondsworth ; New York: Penguin, 1977.

MLA (9th ed.) Citation

Lovins, Amory B. Soft Energy Paths: Toward a Durable Peace. Penguin, 1977.