Spencer, J., Burns, G. P., Cheng, F. C. Y., Cox, A. G., & Welbourn, R. B. (1969). DR SPENCER and his colleagues reply.
शिकागो स्टाइल उद्धरणSpencer, J., G. P. Burns, F. C. Y. Cheng, A. G. Cox, और R. B. Welbourn. DR SPENCER and His Colleagues Reply. 1969.
एमएलए उद्धरणSpencer, J., et al. DR SPENCER and His Colleagues Reply. 1969.
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