APA (7th ed.) Citation

Barrett, N. (2004). Sitting Pretty. Popular Mechanics, 181(4), 106.

Chicago Style (17th ed.) Citation

Barrett, Neal. "Sitting Pretty." Popular Mechanics 181, no. 4 (2004): 106.

MLA (9th ed.) Citation

Barrett, Neal. "Sitting Pretty." Popular Mechanics, vol. 181, no. 4, 2004, p. 106.