To solve the German problem : a free state?
MLA
Sinclair, Upton. To Solve the German Problem: a Free State?. New York: Mrs. Ethel Clyde, [9430?]
APA, 7th edition
Sinclair, U. ([9430?]). To solve the German problem: a free state?. New York: Mrs. Ethel Clyde
Chicago, 17th edition
Sinclair, Upton. To solve the German problem: a free state?. New York: Mrs. Ethel Clyde, [9430?]