In the seventh edition, every sentence that has a corresponding rule in the 21st edition of The Bluebook is followed by an endnote reference to Appendix 8 in the Guide, which provides the rule citation for The Bluebook.  For users of previous editions of the Guide, the documents linked below show which rules in the Guide correspond to those in The Bluebook and vice versa. 

ALWD Guide, 6th edition rule correlations to The Bluebook, 20th edition206.64 KB

The Bluebook, 20th edition rule correlations to ALWD Guide, 6th edition193.16 KB