NA. (1992). What Birdcall is That? Zenodo.
Cita Chicago (17th ed.)NA. What Birdcall Is That? Zenodo, 1992.
Cita MLA (9th ed.)NA. What Birdcall Is That? Zenodo, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)