Smithson, R., & Hobbs, R. C. (1983). Robert Smithson: Retrospective (view) / Robert Hobbs.
Čikaški stil citiranja (17. izdanje)Smithson, Robert, i Robert Carleton Hobbs. Robert Smithson: Retrospective (view) / Robert Hobbs. 1983.
MLA način citiranja (8. izdanje)Smithson, Robert, i Robert Carleton Hobbs. Robert Smithson: Retrospective (view) / Robert Hobbs. 1983.
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