It’s a long shot, but this Oct 2018 is not in my references. Do you know what literature this is from so I can properly quote it?

Leadership is the ability of an individual or a group of individuals to influence and guide followers or other members of an organization (Oct 2018). Human resources can have a competitive advantage if managed effectively in the dynamic global environment. Arguably, organizations must manage their employees effectively by applying different leadership styles that support employee motivation in boosting staff performance. For instance, Oct (2018) proposed that leaders need a diverse mix of competencies that incorporate the management board and junior staff in meeting the overwhelming products awareness and marketing strategies of the 21st century. However, the current findings supported by Oct (2018) indicate that existing literature has limited information on how leadership styles affect employee performance.

You are treating this as if Oct is a person. Is that true or is it supposed to be the month of the year?