Cita APA

Beal, G., & Morton, i. R. As aves. Formar.

Chicago Style (17th ed.) Citation

Beal, George, i il. Robert Morton. As Aves. Formar.

Cita MLA

Beal, George, i il. Robert Morton. As Aves. Formar.

Atenció: Aquestes cites poden no estar 100% correctes.