International Development Research Centre (Canada), Daniels, D., & Nestel, B. L. (1993). Defining critical mass: The case in animal research. International Development Research Centre.
Citace podle Chicago (17th ed.)International Development Research Centre (Canada), Douglas Daniels, a Barry L. Nestel. Defining Critical Mass: The Case in Animal Research. Ottawa: International Development Research Centre, 1993.
Citace podle MLA (9th ed.)International Development Research Centre (Canada), et al. Defining Critical Mass: The Case in Animal Research. International Development Research Centre, 1993.
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