Burg, D. v. (2013). Bob Gramsma: Hard and Fast. Das Kunst-Bulletin.
Cita Chicago (17th ed.)Burg, Dominique von. "Bob Gramsma: Hard and Fast." Das Kunst-Bulletin 2013.
Cita MLA (8th ed.)Burg, Dominique von. "Bob Gramsma: Hard and Fast." Das Kunst-Bulletin, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.