Guida, M. (2019). 1928. Popular bird-watching becomes scientific: The first national bird census in Britain.
Chicago-Zitierstil (17. Ausg.)Guida, Michael. 1928. Popular Bird-watching Becomes Scientific: The First National Bird Census in Britain. 2019.
MLA-Zitierstil (9. Ausg.)Guida, Michael. 1928. Popular Bird-watching Becomes Scientific: The First National Bird Census in Britain. 2019.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.