APA (7th ed.) Citation

Thompson, C. (2019). The First Computers Were Human. Smithsonian, 50(3), 10.

Chicago Style (17th ed.) Citation

Thompson, Clive. "The First Computers Were Human." Smithsonian 50, no. 3 (2019): 10.

MLA (9th ed.) Citation

Thompson, Clive. "The First Computers Were Human." Smithsonian, vol. 50, no. 3, 2019, p. 10.