APA
Hammond N., Everett M., . (1980). Birds of britain and Europe. London: Apan Original.
Chicago
Hammond Nicolas, Everett Michael, . 1980. Birds of britain and Europe. London: Apan Original.
Harvard
Hammond N., Everett M., . (1980). Birds of britain and Europe. London: Apan Original.
MLA
Hammond Nicolas, Everett Michael, . Birds of britain and Europe. London: Apan Original. 1980.
