APA (7th ed.) Citation

Garrard, W. f. (1787). Longitude made easy: From the moon's altitude only. By William Garrard. printed for the author, by J. Moore, No. 43, Drury-Lane.

Chicago Style (17th ed.) Citation

Garrard, William fl. Longitude Made Easy: From the Moon's Altitude Only. By William Garrard. London: printed for the author, by J. Moore, No. 43, Drury-Lane, 1787.

MLA (9th ed.) Citation

Garrard, William fl. Longitude Made Easy: From the Moon's Altitude Only. By William Garrard. printed for the author, by J. Moore, No. 43, Drury-Lane, 1787.