Citazione Stile APA (7a Edizione)

Hobbs, R. C., & Smithson, R. (1981). Robert Smithson: Sculpture / Robert Carleton Hobbs. With contrib. by. Cornell Univ. Press.

Citazione stile Chigago Style (17a edizione)

Hobbs, Robert Carleton, e Robert Smithson. Robert Smithson: Sculpture / Robert Carleton Hobbs. With Contrib. by. Ithaca [u.a.]: Cornell Univ. Press, 1981.

Citatione MLA (8a ed.)

Hobbs, Robert Carleton, e Robert Smithson. Robert Smithson: Sculpture / Robert Carleton Hobbs. With Contrib. by. Cornell Univ. Press, 1981.