kumaravelu, S., & Susheela Kumaravelu. (1990). Astronomy: For degree classes. S kumaravelu.
Čikaški stil citiranjakumaravelu, S., i Susheela Kumaravelu. Astronomy: For Degree Classes. Nagarcovil: S kumaravelu, 1990.
MLA način citiranjakumaravelu, S., i Susheela Kumaravelu. Astronomy: For Degree Classes. S kumaravelu, 1990.
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