ZooNotes. Plovdivskiyat Universitet Paisiy Hilendarskiy.
Cita Chicago (17th ed.)ZooNotes. Plovdivskiyat Universitet Paisiy Hilendarskiy.
Cita MLA (8th ed.)ZooNotes. Plovdivskiyat Universitet Paisiy Hilendarskiy.
Atenció: Aquestes cites poden no estar 100% correctes.