Wheeler, W. H. (1898). Wheeler's graded studies in English: First lessons in grammar and composition. W.H. Wheeler and Co..
Chicago-referens (17:e uppl.)Wheeler, William H. Wheeler's Graded Studies in English: First Lessons in Grammar and Composition. Chicago: W.H. Wheeler and Co., 1898.
MLA-referens (8:e uppl.)Wheeler, William H. Wheeler's Graded Studies in English: First Lessons in Grammar and Composition. W.H. Wheeler and Co., 1898.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.