- $6.29Nadine Gordimer : A Bibliography of Primary and Secondary SourcesBetter World Books
- $63.80Empedocles' Cosmic Cycle : A Reconstruction from the Fragments and Secondary Sources by Denis O'BrienBetter World Books
- $20.00Primary Vs. Secondary Sources Anchor ChartEtsy
- $9.90O Pioneers! : Includes MLA Style Citations for Scholarly Secondary Sources, Peer-Reviewed Journal Articles and Critical Essays by Willa CatherBetter World Books
- $5.81Narrative of the Captivity and Restoration of Mrs. Mary Rowlandson : Includes MLA Style Citations for Scholarly Secondary Sources, Peer-Reviewed JournBetter World Books