Cita APA (7a ed.)

Amstrong, E. A. (1963). A study of bird song. Oxford University Press.

Cita Chicago Style (17a ed.)

Amstrong, Edward A. A Study of Bird Song. London: Oxford University Press, 1963.

Cita MLA (9a ed.)

Amstrong, Edward A. A Study of Bird Song. Oxford University Press, 1963.