Citazione APA

Rollnik, H., & Pfeil, W. (1974). Proceedings. North-Holland Publishing Company.

Stile di citazione Chicago

Rollnik, H., e W. Pfeil. Proceedings. Amsterdam: North-Holland Publishing Company, 1974.

Citazione MLA

Rollnik, H., e W. Pfeil. Proceedings. North-Holland Publishing Company, 1974.