APA (7th ed.) Citation

Collins, A. E. P., & Colline, A. E. P. (1950). A flint knife from County Tyrone.

Chicago Style (17th ed.) Citation

Collins, A. E. P., and A. E. P. Colline. A Flint Knife from County Tyrone. 1950.

MLA (9th ed.) Citation

Collins, A. E. P., and A. E. P. Colline. A Flint Knife from County Tyrone. 1950.

Warning: These citations may not always be 100% accurate.