Twaddell, W. F. (1965). The english verb auxilliaries. Brown University Press.
Chicago Style (17th ed.) CitationTwaddell, William Freeman. The English Verb Auxilliaries. Providence: Brown University Press, 1965.
MLA引文Twaddell, William Freeman. The English Verb Auxilliaries. Brown University Press, 1965.
警告:這些引文格式不一定是100%准確.