Best practices for fundraising success : diversifying giving channels / Katya Adresen, Melissa Bank Stepno, Amy Braiterman [a. o.]. - [S. l.] : Blackbaud, 2012. - 1 онлайн-ресурс (VI, 62 p.). URL: https://www.blackbaud.com/files/resources/7-12.Desktop.Book.Web.pdf