APA-viite (7. p.)
GRAVES, W., & ET AL. (1991). DIRECTORY OF NATIONAL INFORMATION SOURCES ON DISABILITIES. NATIONAL INSTITUTE ON DISABILITY AND REHABILITATION RESEARCH.
Chicago-viite (17. p.)
GRAVES, W.H, ja ET AL. DIRECTORY OF NATIONAL INFORMATION SOURCES ON DISABILITIES. WASHINGTON,DC (USA): NATIONAL INSTITUTE ON DISABILITY AND REHABILITATION RESEARCH, 1991.
MLA-viite (9. p.)
GRAVES, W.H, ja ET AL. DIRECTORY OF NATIONAL INFORMATION SOURCES ON DISABILITIES. NATIONAL INSTITUTE ON DISABILITY AND REHABILITATION RESEARCH, 1991.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.