Purushothaman, P. V. A. (2008). Vigotskiyum vidyaabhyaasavum.
シカゴスタイル引用形Purushothaman, P V; Author. Vigotskiyum Vidyaabhyaasavum. Thrissur, Kerala Sastra Sahitya Parishat Ke, 2008.
MLA引用形式Purushothaman, P V; Author. Vigotskiyum Vidyaabhyaasavum. 2008.
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