APA (7e ed.) Bronvermelding

Kessler, C. (1993). International Scientific Cooperation, Consolidated report of activities, 1987 - 90. s.n.

Chicago (17e ed.) Bronvermelding

Kessler, C. International Scientific Cooperation, Consolidated Report of Activities, 1987 - 90. s.l: s.n, 1993.

MLA (9e ed.) Bronvermelding

Kessler, C. International Scientific Cooperation, Consolidated Report of Activities, 1987 - 90. s.n, 1993.

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