MLA

photography board, Yale Banner Publications. Walter Riedel, Harold Riedl, Donald Rieger, Phelps Riley, Armstead Robinson and Richard Robinson from the"Yale Class Book 1968. 1968. https://collections.library.yale.edu/catalog/10021934.

APA, 6th edition

photography board, Y. B. P. (1968). Walter Riedel, Harold Riedl, Donald Rieger, Phelps Riley, Armstead Robinson and Richard Robinson from the"Yale Class Book 1968. [Books (part of)]. https://collections.library.yale.edu/catalog/10021934.