APA (7th ed.) Citation

Gregory, C. R. (1997). The cognac companion: A connoisseur's guide. Apple.

Chicago Style (17th ed.) Citation

Gregory, Conal R. The Cognac Companion: A Connoisseur's Guide. London: Apple, 1997.

MLA (9th ed.) Citation

Gregory, Conal R. The Cognac Companion: A Connoisseur's Guide. Apple, 1997.