APA (7e ed.) Bronvermelding

Não informado. (1984). Data base directory. Knowledge Industry Publications.

Chicago (17e ed.) Bronvermelding

Não informado. Data Base Directory. White Plains, NY: Knowledge Industry Publications, 1984.

MLA (8e ed.) Bronvermelding

Não informado. Data Base Directory. Knowledge Industry Publications, 1984.

Let op: Deze citaties zijn niet altijd 100% accuraat.