APA (7th ed.) Citation

Clarke, J. C., Clarke, J. C., & Clarke, J. C. (1974). Dux grammaticus. Scolar Pr.

Chicago Style (17th ed.) Citation

Clarke, John C., John C. Clarke, and John C. Clarke. Dux Grammaticus. London: Scolar Pr, 1974.

MLA (9th ed.) Citation

Clarke, John C., et al. Dux Grammaticus. Scolar Pr, 1974.