APA
May T. E., Boulton C. J., Barclay H., Sweetman J., Limon D. & Keith B. (1989). Erskine May's Treatise on the law, privileges, proceedings and usage of Parliament. London: Butterworth.
Chicago
May Thomas Erskine, Boulton C J, Barclay H.M, Sweetman John, Limon D.W and Keith B.P. 1989. Erskine May's Treatise on the law, privileges, proceedings and usage of Parliament. London: Butterworth.
Harvard
May T. E., Boulton C. J., Barclay H., Sweetman J., Limon D. and Keith B. (1989). Erskine May's Treatise on the law, privileges, proceedings and usage of Parliament. London: Butterworth.
MLA
May Thomas Erskine, Boulton C J, Barclay H.M, Sweetman John, Limon D.W and Keith B.P. Erskine May's Treatise on the law, privileges, proceedings and usage of Parliament. London: Butterworth. 1989.