Horn, T. D., & Otto, H. J. (1954). Spelling Instruction: A Curriculum. University of Texas.
Chicago Style (17th ed.) CitationHorn, Thomas D., and H. J. Otto. Spelling Instruction: A Curriculum. Austin: University of Texas, 1954.
MLA (9th ed.) CitationHorn, Thomas D., and H. J. Otto. Spelling Instruction: A Curriculum. University of Texas, 1954.