(2016). The effect of Thelin model in the collection of material Biology and retention of first year students Average. Alustath, 2(217), 339-364.
. "The effect of Thelin model in the collection of material Biology and retention of first year students Average". Alustath, 2, 217, 2016, 339-364.
(2016). 'The effect of Thelin model in the collection of material Biology and retention of first year students Average', Alustath, 2(217), pp. 339-364.
The effect of Thelin model in the collection of material Biology and retention of first year students Average. Alustath, 2016; 2(217): 339-364.


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