Stephen Thomas Erlewine, "N.W.A: Biography", AllMusic.com, Netaktion LLC, visited 26 Apr 2020.
books.google.com
Robin D. G. Kelley, "Kickin' reality, kickin' ballistics: Gangsta rap and postindustrial Los Angeles", in William Eric Perkins, ed., Droppin' Science: Critical Essays on Rap Music and Hip Hop Culture (Philadelphia: Temple University Press, 1996), p 128.
David Diallo, "Dr. Dre and Snoop Dogg", in Mickey Hess, ed., Icons of Hip Hop: An Encyclopedia of the Movement, Music, and Culture (Santa Barbara, CA: Greenwood Press, 2007), pp 321–322.
Gerrick D. Kennedy, Parental Discretion Is Advised: The Rise of N.W.A and the Dawn of Gangsta Rap (New York: Atria Books, 2017), pp 85–86.
David Diallo, ch 10 "From electro-rap to G-funk: A social history of rap music in Los Angeles and Compton, California", in Mickey Hess, ed., Hip Hop in America: A Regional Guide, Volume 1: East Coast and West Coast (Santa Barbara, CA: Greenwood Press, 2010), p 233 on World Class Wreckin' Cru, pp 234–238 on N.W.A.
In the photo, the five, eventual N.W.A members are side by side in the center: Eazy-E, Dr. Dre, Ice Cube, Arabian Prince, and MC Ren. Otherwise, there are seven others. Two of them had already formed, with Ice Cube, the rap trio C.I.A.: Anthony "Sir Jinx" Wheaton and Darryll "Kid Disaster" or "K-Dee" Johnson. Another two were in another rap group, CPO: Clarence "DJ Train" Lars and Granville "MC Chip" Moton. Also, there are LaMont "DJ Scratch" or "King Scratch" Burnett, Candell "Candyman" Manson, and Damon "Krazy D" Trujillo. For backstory and developments on each, see Martin Cizmar, "N.W.A. and the Posse: Where are the 12 guys from N.W.A's first album cover now?", Phoenix New Times, 15 Mar 2010.