APA (7th ed.) Citation

Vogel, H. U. (1993). The Great Well of China. Scientific American, 268(6), .

Chicago Style (17th ed.) Citation

Vogel, Hans Ulrich. "The Great Well of China." Scientific American 268, no. 6 (1993).

MLA (9th ed.) Citation

Vogel, Hans Ulrich. "The Great Well of China." Scientific American, vol. 268, no. 6, 1993.