Wilkinson, W. C. (1887). Classic German course in English / by William Cleaver Wilkinson. Chautauqua Press.
Chicago-referens (17:e uppl.)Wilkinson, William Cleaver. Classic German Course in English / by William Cleaver Wilkinson. New York: Chautauqua Press, 1887.
MLA-referens (8:e uppl.)Wilkinson, William Cleaver. Classic German Course in English / by William Cleaver Wilkinson. Chautauqua Press, 1887.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.