Παραπομπή APA

Frankel, P. H. (1969). Essentials of petroleum: A key to oil economics (New ed. with a foreword by M. A. Adelman.). London: Cass.

Παραπομπή Chicago Style

Frankel, Paul H. Essentials of Petroleum: A Key to Oil Economics. New ed. with a foreword by M. A. Adelman. London: Cass, 1969.

Παραπομπή MLA

Frankel, Paul H. Essentials of Petroleum: A Key to Oil Economics. New ed. with a foreword by M. A. Adelman. London: Cass, 1969.

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