Eldridge, E. H. (1955). Eldridge-Good Business speller and vocabulary builder. American Book Co.
Čikaški stil citiranja (17. izdanje)Eldridge, Edward H. Eldridge-Good Business Speller and Vocabulary Builder. New York: American Book Co, 1955.
MLA način citiranja (8. izdanje)Eldridge, Edward H. Eldridge-Good Business Speller and Vocabulary Builder. American Book Co, 1955.
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