Throughout this book, three books by the author (in one instance, as coauthor), published by John Wiley & Sons, are referenced as follows:

1. The Law of Fundraising, Fifth Edition (2013): cited as Fundraising
2. The Law of Tax-Exempt Organizations, Twelfth Edition (2019): cited as Tax-Exempt Organizations
3. The Tax Law of Private Foundations, Fifth Edition (2018): cited as Private Foundations

These books are annually supplemented. Also, updates on the foregoing subjects (plus The Tax Law of Charitable Giving) are available in Bruce R. Hopkins' Nonprofit Counsel, the author's monthly newsletter, also published by John Wiley & Sons.