MLA

Wallerstein, Immanuel Maurice, 1930-. Associação Portugal/Angola. Box 2. 1978. https://collections.library.yale.edu/catalog/17317497.

APA, 6th edition

Wallerstein, Immanuel Maurice, 1930-. (["Box 2"])(1978)[Associação Portugal/Angola]. https://collections.library.yale.edu/catalog/17317497.