One useful collection of primary source material for the Greek and Roman time period is:
Loeb Classical Library, in PA3000-6700, on the third floor.
The green set is for Greek writings and the red set is for Roman writings, Search a historian or poet or philosopher as an author in the library catalog for exact call numbers.
Other ideas for primary sources include:
Of course, for written documents a reliable translation can be used since you are not expected to read any ancient language.
____________________________________________________________________________________________________
Current List of Primary Source Databases at Nimitz Library
Loeb Classical Library - Searchable online (by time period, etc.) then go to the print volumes in Nimitz Library:
A Timeline of Authors is also available
Listed here are examples of document collections in print only (no online access). One is in the Reference collection on the first floor, but like many primary source collections, the others are in the general collection.