MLA

Bruce, Robert, fl. 167, Marischal College and University. Illustrissimo, nobilissimo, ac potentissimo heroi Alexandro, Kincardniae comiti ... : Theses hasce philosophicas A.P.D.O.M. propugnabunt sub praesidio Roberti Brussii supra nominati juvenes ex Collegio Marischallano Aberdonensi, hac vice, cum magisteriali. 1670. https://collections.library.yale.edu/catalog/2019992.

APA, 6th edition

Bruce, Robert, fl. 167, & Marischal College and University. (1670)[Illustrissimo, nobilissimo, ac potentissimo heroi Alexandro, Kincardniae comiti ... : Theses hasce philosophicas A.P.D.O.M. propugnabunt sub praesidio Roberti Brussii supra nominati juvenes ex Collegio Marischallano Aberdonensi, hac vice, cum magisteriali]. https://collections.library.yale.edu/catalog/2019992.