The American system of English grammar :
to which will soon be appended a key and exercise, developing the constructive principles of the English language ... /
by James Brown.

APA Citation

Brown, J. (1826). The American system of English grammar: to which will soon be appended a key and exercise, developing the constructive principles of the English language .... Rev. and enl. Washington: The Author.

MLA Citation

Brown, James, grammarian. The American System of English Grammar: to Which Will Soon Be Appended a Key And Exercise, Developing the Constructive Principles of the English Language .... Rev. and enl. Washington: The Author, 1826.

Warning: These citations may not always be complete (especially for serials).