Rocks, L., & Runyon, R. P. (1972). The energy crisis. Crown Publishers.
Cita Chicago (17th ed.)Rocks, Lawrence, i Richard P. Runyon. The Energy Crisis. New York: Crown Publishers, 1972.
Cita MLA (9th ed.)Rocks, Lawrence, i Richard P. Runyon. The Energy Crisis. Crown Publishers, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.