APA

Greta N., . (1985). Importation of birds into the United States 1980-1984. Washington: Animal Welfare Institute.

Chicago

Greta Nilsson, . 1985. Importation of birds into the United States 1980-1984. Washington: Animal Welfare Institute.

Harvard

Greta N., . (1985). Importation of birds into the United States 1980-1984. Washington: Animal Welfare Institute.

MLA

Greta Nilsson, . Importation of birds into the United States 1980-1984. Washington: Animal Welfare Institute. 1985.