APA (7th ed.) Citation

Columbus, C., Cosco, L. d., & Robbins, F. E. (1966). Epistola de insulis nuper inventis. University Microfilms.

Chicago Style (17th ed.) Citation

Columbus, Christopher, Leandro di Cosco, and Frank Egleston Robbins. Epistola De Insulis Nuper Inventis. Ann Arbor [Mich.]: University Microfilms, 1966.

MLA (9th ed.) Citation

Columbus, Christopher, et al. Epistola De Insulis Nuper Inventis. University Microfilms, 1966.