Cita APA (7th ed.)

Ion, D. C. (1975). Availability of world energy resources. Graham and Trotman Ltd.

Cita Chicago (17th ed.)

Ion, D. C. Availability of World Energy Resources. London: Graham and Trotman Ltd, 1975.

Cita MLA (9th ed.)

Ion, D. C. Availability of World Energy Resources. Graham and Trotman Ltd, 1975.