APA (7th ed.) Citation

Grace, R. (2007). Oil: An overview of the petroleum industry (6th ed.). Gulf Pub. Co.

Chicago Style (17th ed.) Citation

Grace, Robert. Oil: An Overview of the Petroleum Industry. 6th ed. Houston, Tex: Gulf Pub. Co, 2007.

MLA (9th ed.) Citation

Grace, Robert. Oil: An Overview of the Petroleum Industry. 6th ed. Gulf Pub. Co, 2007.