APA (7th ed.) Citation

Horn, E., & Ashbaugh, E. J. (1920). Lippincotts Horn-Ashbaugh speller for grades one to eight. J.B. Lippincott company.

Chicago Style (17th ed.) Citation

Horn, Ernest, and Ernest James Ashbaugh. Lippincotts Horn-Ashbaugh Speller for Grades One to Eight. Philadelphia, London: J.B. Lippincott company, 1920.

MLA (9th ed.) Citation

Horn, Ernest, and Ernest James Ashbaugh. Lippincotts Horn-Ashbaugh Speller for Grades One to Eight. J.B. Lippincott company, 1920.