(2009). Impact of the use method of contrasting events in the collection of second grade students and middle Tvkirhen scientific. , 5(43), 60-69.
. "Impact of the use method of contrasting events in the collection of second grade students and middle Tvkirhen scientific". , 5, 43, 2009, 60-69.
(2009). 'Impact of the use method of contrasting events in the collection of second grade students and middle Tvkirhen scientific', , 5(43), pp. 60-69.
Impact of the use method of contrasting events in the collection of second grade students and middle Tvkirhen scientific. , 2009; 5(43): 60-69.