MLA
Berg, Gary A. "History of Correspondence Instruction." Encyclopedia of Distance Learning, edited by Caroline Howard, et al., IGI Global, 2005, pp. 1006-1011. https://doi.org/10.4018/978-1-59140-555-9.ch147
APA
Berg, G. A. (2005). History of Correspondence Instruction. In C. Howard, J. Boettcher, L. Justice, K. Schenk, P. Rogers, & G. Berg (Eds.), Encyclopedia of Distance Learning (pp. 1006-1011). IGI Global. https://doi.org/10.4018/978-1-59140-555-9.ch147
Chicago
Berg, Gary A. "History of Correspondence Instruction." In Encyclopedia of Distance Learning, edited by Caroline Howard, et al., 1006-1011. Hershey, PA: IGI Global, 2005. https://doi.org/10.4018/978-1-59140-555-9.ch147
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