From single authored sources, just 16% of citations had no contract involving the singleness of this writer as well as the verb utilized to attribute their concept, set alongside the 25% from numerous authored sources. Two samples of errors from pupils’ essays for single authored and multiple authored sources correspondingly are Pinnock, (2009) state. and Smits, Huisman and Kruijff (2008) states. . The majority of the mistakes from numerous authored sources associated to citations by using et al. like in Winch, et.al (2006) observes that. There have been additionally circumstances in which a solitary writer cites numerous writers like Kame’enui (1997), cited in Yopp et al (2002) state.