APA-viite (7. p.)
Hay, R., Lim, V., Blocher, D., Ketelarr, J., Hay, S., & Taylor, D. W. (2007). Worth keeping: Global perspectives on best practice in missionary retention. William Carey Library.
Chicago-viite (17. p.)
Hay, Rob, Valerie Lim, Detlef Blocher, Jaap Ketelarr, Sarah Hay, ja D. Wiliam Taylor. Worth Keeping: Global Perspectives on Best Practice in Missionary Retention. Pasadena: William Carey Library, 2007.
MLA-viite (9. p.)
Hay, Rob, et al. Worth Keeping: Global Perspectives on Best Practice in Missionary Retention. William Carey Library, 2007.
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