McCullough, C. M., Strang, R., & Traxler, A. E. (1961). The Improvement of reading (3d ed. of Problems in the improvement of reading.). McGraw-Hill.
Παραπομπή σε μορφή Chicago (17η εκδ.)McCullough, Constance Mary, Ruth Strang, και Arthur E. Traxler. The Improvement of Reading. 3d ed. of Problems in the improvement of reading. New York: McGraw-Hill, 1961.
Παραπομπή σε μορφή MLA (9th εκδ.)McCullough, Constance Mary, et al. The Improvement of Reading. 3d ed. of Problems in the improvement of reading. McGraw-Hill, 1961.
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