Howell, A. H. (1906). Birds that eat the cotton boll weevil: A report of progress. Government Printing Office.
Chicago-Zitierstil (17. Ausg.)Howell, Arthur Holmes. Birds That Eat the Cotton Boll Weevil: A Report of Progress. Washington: Government Printing Office, 1906.
MLA-Zitierstil (9. Ausg.)Howell, Arthur Holmes. Birds That Eat the Cotton Boll Weevil: A Report of Progress. Government Printing Office, 1906.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.