APA (7th ed.) Citation

MacKenzie, D. (2002). What's in the bottle? London Review of Books, 24(9), 21.

Chicago Style (17th ed.) Citation

MacKenzie, Donald. "What's in the Bottle?" London Review of Books 24, no. 9 (2002): 21.

MLA (9th ed.) Citation

MacKenzie, Donald. "What's in the Bottle?" London Review of Books, vol. 24, no. 9, 2002, p. 21.