APA (7th ed.) Citation

Pope, A. An astronomical diary: or almanack, for the year of our Lord 1793: ... Calculated for the meridian of Boston, (lat. 42 deg. 25 min. north: long. 70 deg. 56 min. west of Greenwich Observatory) but will serve for all the New-England states.

Chicago Style (17th ed.) Citation

Pope, Amos. An Astronomical Diary: Or Almanack, for the Year of Our Lord 1793: ... Calculated for the Meridian of Boston, (lat. 42 Deg. 25 Min. North: Long. 70 Deg. 56 Min. West of Greenwich Observatory) but Will Serve for All the New-England States.

MLA (9th ed.) Citation

Pope, Amos. An Astronomical Diary: Or Almanack, for the Year of Our Lord 1793: ... Calculated for the Meridian of Boston, (lat. 42 Deg. 25 Min. North: Long. 70 Deg. 56 Min. West of Greenwich Observatory) but Will Serve for All the New-England States.