APA (7th ed.) Zitazioa
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 Style (17th ed.) Zitazioa
Hay, Rob, Valerie Lim, Detlef Blocher, Jaap Ketelarr, Sarah Hay, eta D. Wiliam Taylor. Worth Keeping: Global Perspectives on Best Practice in Missionary Retention. Pasadena: William Carey Library, 2007.
MLA (9th ed.) Zitazioa
Hay, Rob, et al. Worth Keeping: Global Perspectives on Best Practice in Missionary Retention. William Carey Library, 2007.
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