Cita APA (7th ed.)

Kay, M., & Goodfellow, R. (1974). Marketing petroleum products. Macmillan.

Cita Chicago (17th ed.)

Kay, Martin, i Robin Goodfellow. Marketing Petroleum Products. London: Macmillan, 1974.

Cita MLA (9th ed.)

Kay, Martin, i Robin Goodfellow. Marketing Petroleum Products. Macmillan, 1974.