Tower, D. B., & Tweed, B. F. (1855). Gradual lessons in grammar, or, Guide to the construction of the English language by the analysis and composition of sentences. Daniel Burgess & Co..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTower, David B., और Benjamin F. Tweed. Gradual Lessons in Grammar, or, Guide to the Construction of the English Language by the Analysis and Composition of Sentences. New York: Daniel Burgess & Co., 1855.
एमएलए (8वां संस्करण) प्रशस्ति पत्रTower, David B., और Benjamin F. Tweed. Gradual Lessons in Grammar, or, Guide to the Construction of the English Language by the Analysis and Composition of Sentences. Daniel Burgess & Co., 1855.
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