International Development Research Centre (Canada), Daniels, D., & Nestel, B. L. (1993). Defining critical mass: The case in animal research. International Development Research Center.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিInternational Development Research Centre (Canada), Douglas Daniels, এবং Barry L. Nestel. Defining Critical Mass: The Case in Animal Research. Ottawa, Canada: International Development Research Center, 1993.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিInternational Development Research Centre (Canada), et al. Defining Critical Mass: The Case in Animal Research. International Development Research Center, 1993.
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