APA (7th ed.) Citation

Downes, J. (1850). Occultations visible in U.S. during year 1851, computed by John Downes at expense of fund appropriated by Congress for establishment of Nautical Almanac. [publisher not identified].

Chicago Style (17th ed.) Citation

Downes, John. Occultations Visible in U.S. During Year 1851, Computed by John Downes at Expense of Fund Appropriated by Congress for Establishment of Nautical Almanac. Washington, D.C.: [publisher not identified], 1850.

MLA (9th ed.) Citation

Downes, John. Occultations Visible in U.S. During Year 1851, Computed by John Downes at Expense of Fund Appropriated by Congress for Establishment of Nautical Almanac. [publisher not identified], 1850.