Παραπομπή APA

Sawhill,John C. (1978). Energy conservation and public policy. Prentice Hall.

Παραπομπή Chicago Style

Sawhill,John C. Energy Conservation and Public Policy. New Jersey: Prentice Hall, 1978.

Παραπομπή MLA

Sawhill,John C. Energy Conservation and Public Policy. Prentice Hall, 1978.