APA (7e ed.) Bronvermelding
Carlson, R., & Goldman, B. (1991). 2020 Visions: Long view of a changing world. Stanford Alumni Association.
Chicago (17e ed.) Bronvermelding
Carlson, Richard, en Bruce Goldman. 2020 Visions: Long View of a Changing World. USA: Stanford Alumni Association, 1991.
MLA (9e ed.) Bronvermelding
Carlson, Richard, en Bruce Goldman. 2020 Visions: Long View of a Changing World. Stanford Alumni Association, 1991.
Let op: Deze citaties zijn niet altijd 100% accuraat.