Cita APA (7a ed.)

Voous, K. (1991). List of recent Holarctic bird species (2nd ed.). The British Ornithologists' Union.

Cita Chicago Style (17a ed.)

Voous, K.H. List of Recent Holarctic Bird Species. 2nd ed. London: The British Ornithologists' Union, 1991.

Cita MLA (9a ed.)

Voous, K.H. List of Recent Holarctic Bird Species. 2nd ed. The British Ornithologists' Union, 1991.