MLA

Wallerstein, Immanuel Maurice, 1930-. Anti-Apartheid Movement. Box 2. undated. https://collections.library.yale.edu/catalog/17317499.

APA, 6th edition

Wallerstein, Immanuel Maurice, 1930-. (["Box 2"])(undated)[Anti-Apartheid Movement]. https://collections.library.yale.edu/catalog/17317499.