↑Hopkins, Bruce R. (2011), The Law of Tax-Exempt Organizations (10 ed.), John Wiley and Sons, p. 879, ISBN978-0-470-60217-1
↑Judith S. Ballan, "How To Aid a Foreign Charity Through an 'American Friends of' Organization", in Proceedings of the Twenty-Third New York University Conference on Tax Planning.
↑Larkin, Richard F.; DiTommaso, Marie (2011), Wiley Not-for-Profit GAAP 2011: Interpretation and Application of Generally Accepted Accounting Principles, John Wiley and Sons, p. Ch.11, ISBN978-0-470-55445-6