Parry, Keith (2001) [1994]. "The Mormon Missionary Companionship". In Cornwall, Marie; Heaton, Tim B.; Young, Lawrence A. (eds.). Contemporary Mormonism: Social Science Perspectives. Urbana: University of Illinois Press. p. 182. ISBN0-252-02076-6. OCLC28721262.
Stewart, David G. Jr. (2007), The Law Of The Harvest: Practical Principles of Effective Missionary Work, Henderson, NV: Cumorah Foundation, ISBN978-0-9795121-0-0, OCLC144460788.