Adcock, Dwayne. "A comparison of the effects of three approaches upon the development of listening comprehension in Spanish and upon the improvement of reading skills in English of below-average readers enrolled in the first year of FLES Spanish (grade 4) /." Doctoral dissertation, Ohio State University, 1980. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487093435463296Chicago Manual of Style (17th edition)