Gilbert, D. W. (1959). Breaking the reading barrier. Prentice -Hall Inc.
Chicago Edition CitationGilbert, Davis Wilcox. Breaking the Reading Barrier. USA: Prentice -Hall Inc, 1959.
MLA Edition CitationGilbert, Davis Wilcox. Breaking the Reading Barrier. Prentice -Hall Inc, 1959.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.