APA (7th ed.) Citation

Sharrock, J. T. R. (1980). The Frontiers of bird identification: A British birds guide to some difficult species. Macmillan.

Chicago Style (17th ed.) Citation

Sharrock, J. T. R. The Frontiers of Bird Identification: A British Birds Guide to Some Difficult Species. London: Macmillan, 1980.

MLA (9th ed.) Citation

Sharrock, J. T. R. The Frontiers of Bird Identification: A British Birds Guide to Some Difficult Species. Macmillan, 1980.