Hassall, Graham (1992), «Pacific Baha'i Communities 1950-1964», en H. Rubinstein, Donald, ed., Pacific History: Papers from the 8th Pacific History Association Conference, University of Guam Press & Micronesian Area Research Center, Guam, pp. 73-95.
Bureau of Democracy, Human Rights, and Labor (15 de septiembre de 2006). «International Religious Freedom Report - Tonga». United States State Department. Consultado el 15 de septiembre de 2008.