APA (7th ed.) Citation

Eldridge, E. H. (1955). Eldridge-Good Business speller and vocabulary builder. American Book Co.

Chicago Style (17th ed.) Citation

Eldridge, Edward H. Eldridge-Good Business Speller and Vocabulary Builder. New York: American Book Co, 1955.

MLA (8th ed.) Citation

Eldridge, Edward H. Eldridge-Good Business Speller and Vocabulary Builder. American Book Co, 1955.

Warning: These citations may not always be 100% accurate.