Jacobs, S. (2013). Membership rules!: The art of selling what matters (First edition.). Jossey-Bass.
Lua i Stíl Chicago (17ú heag.)Jacobs, Sheri. Membership Rules!: The Art of Selling What Matters. First edition. San Francisco, CA: Jossey-Bass, 2013.
Lua MLA (9ú heag.)Jacobs, Sheri. Membership Rules!: The Art of Selling What Matters. First edition. Jossey-Bass, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.