Cita APA (7th ed.)

Campbell, B. (1979). Birdwatcher at large. JU. M. Dent and Sos, Ltd.

Cita Chicago (17th ed.)

Campbell, Bruce. Birdwatcher at Large. London: JU. M. Dent and Sos, Ltd, 1979.

Cita MLA (9th ed.)

Campbell, Bruce. Birdwatcher at Large. JU. M. Dent and Sos, Ltd, 1979.