Identify the APA error. In a qualitative ethnographic study of shop-floor workers, (Smith & Williams 2012) observed the daily operations and culture in a small paper mill. Building on their observations, they interviewed 25 workers in the pulp processing department and found that workers often resisted employer provided educational opportunities due to preconceived barriers to learning (Smith & Williams, 2012). O Misuse of parenthetical citation in first sentence O Incorrect use of passive voice O Use of "observed" instead of "observes" O Misuse of parenthetical citation in last sentence