APA (7th ed.) Citation

Law, A., & Hopkins, D. The rudiments of music: or A short and easy treatise on the rules of psalmody: To which are annnexed [as printed], a number of psalm and hymn tunes. (Fourth edition. With the addition of a number of pieces never before published.).

Chicago Style (17th ed.) Citation

Law, Andrew, and Daniel Hopkins. The Rudiments of Music: Or A Short and Easy Treatise on the Rules of Psalmody: To Which Are Annnexed [as Printed], a Number of Psalm and Hymn Tunes. Fourth edition. With the addition of a number of pieces never before published.

MLA (9th ed.) Citation

Law, Andrew, and Daniel Hopkins. The Rudiments of Music: Or A Short and Easy Treatise on the Rules of Psalmody: To Which Are Annnexed [as Printed], a Number of Psalm and Hymn Tunes. Fourth edition. With the addition of a number of pieces never before published.

Warning: These citations may not always be 100% accurate.