APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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