Adeleke, Ismaila, and Ade Ibiwoye. “Network Sampling of Hard-to-Reach Population: An Application to the Substance Abuse Problem Among Tertiary Education Students in Nigeria”. International Journal of Asian Social Science 1, no. 5 (December 9, 2011): 133–141. Accessed November 23, 2024. https://archive.aessweb.com/index.php/5007/article/view/2146.