Ruijter, G. d. (1997). Gerco de Ruijter: Portfolio of the exhibition. Cahier.
Chicago-Zitierstil (17. Ausg.)Ruijter, Gerco de. "Gerco De Ruijter: Portfolio of the Exhibition." Cahier 1997.
MLA-Zitierstil (8. Ausg.)Ruijter, Gerco de. "Gerco De Ruijter: Portfolio of the Exhibition." Cahier, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.