Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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