Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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