If you are footnoting the same page, eg:
1 Locke, J. (1690), Minds, Bodies and Persons Reader, pg. 84
2 Cushing, S. (2002)
3 Baker, L. (2000)
4 Shannon, C. (19??)
5 Locke, J. (1690), Minds, Bodies and Persons Reader, pg. 84
6 Cushing (2002)
How can you make it look like:
1,5...