APA (7th ed.) Citation

Lovins, A. B. (1977). Soft energy paths: Toward a durable peace (1. publ.). Penguin books.

Chicago Style (17th ed.) Citation

Lovins, Amory B. Soft Energy Paths: Toward a Durable Peace. 1. publ. Harmondsworth [u.a.]: Penguin books, 1977.

MLA (9th ed.) Citation

Lovins, Amory B. Soft Energy Paths: Toward a Durable Peace. 1. publ. Penguin books, 1977.