APA

United States, . (1993). National Poultry Improvement Plan: 1993 directory of participants handling waterfowl, exhibition poultry, and game birds. Hyattsville, MD: U.S. Dept. of Agriculture, Animal and Plant Health Inspection Service.

Chicago

United States, . 1993. National Poultry Improvement Plan: 1993 directory of participants handling waterfowl, exhibition poultry, and game birds. Hyattsville, MD: U.S. Dept. of Agriculture, Animal and Plant Health Inspection Service.

Harvard

United States, . (1993). National Poultry Improvement Plan: 1993 directory of participants handling waterfowl, exhibition poultry, and game birds. Hyattsville, MD: U.S. Dept. of Agriculture, Animal and Plant Health Inspection Service.

MLA

United States, . National Poultry Improvement Plan: 1993 directory of participants handling waterfowl, exhibition poultry, and game birds. Hyattsville, MD: U.S. Dept. of Agriculture, Animal and Plant Health Inspection Service. 1993.