APA (7th ed.) Citation

Hellins, J. (1792). An extract from a letter of the Rev. Mr. John Hellins, formerly assistant to Mr. (now Dr.) Maskelyne, the Astronomer-Royal at Greenwich Observatory, to Francis Maseres, Esq. Dated Potter's Pury, near Stoney Stratford, in Buckinghamshire, Sept. 25, 1792. [publisher not identified].

Chicago Style (17th ed.) Citation

Hellins, John. An Extract from a Letter of the Rev. Mr. John Hellins, Formerly Assistant to Mr. (now Dr.) Maskelyne, the Astronomer-Royal at Greenwich Observatory, to Francis Maseres, Esq. Dated Potter's Pury, Near Stoney Stratford, in Buckinghamshire, Sept. 25, 1792. [London]: [publisher not identified], 1792.

MLA (9th ed.) Citation

Hellins, John. An Extract from a Letter of the Rev. Mr. John Hellins, Formerly Assistant to Mr. (now Dr.) Maskelyne, the Astronomer-Royal at Greenwich Observatory, to Francis Maseres, Esq. Dated Potter's Pury, Near Stoney Stratford, in Buckinghamshire, Sept. 25, 1792. [publisher not identified], 1792.