APA (7e ed.) Bronvermelding
GRAVES, W., & ET AL. (1993). DIRECTORY OF NATIONAL INFORMATION SOURCES ON DISABILITIES. NATIONAL INSTITUTE ON DISABILITY AND REHABILITATION RESEARCH.
Chicago (17e ed.) Bronvermelding
GRAVES, W.H, en ET AL. DIRECTORY OF NATIONAL INFORMATION SOURCES ON DISABILITIES. WASHINGTON,DC (USA): NATIONAL INSTITUTE ON DISABILITY AND REHABILITATION RESEARCH, 1993.
MLA (9e ed.) Bronvermelding
GRAVES, W.H, en ET AL. DIRECTORY OF NATIONAL INFORMATION SOURCES ON DISABILITIES. NATIONAL INSTITUTE ON DISABILITY AND REHABILITATION RESEARCH, 1993.
Let op: Deze citaties zijn niet altijd 100% accuraat.