APA (7th ed.) Citation

Gillmor, D., Grace, M., & Armitage, E. (1977). New geography. Gill and Macmillan.

Chicago Style (17th ed.) Citation

Gillmor, Desmond, Michael Grace, and Ernest Armitage. New Geography. Dublin: Gill and Macmillan, 1977.

MLA (9th ed.) Citation

Gillmor, Desmond, et al. New Geography. Gill and Macmillan, 1977.