Pfeiffer, H. Geiz: Helmut Pfeiffer. Handbuch Literatur & Ökonomie.(2020).
Cita Chicago (17th ed.)Pfeiffer, Helmut. "Geiz: Helmut Pfeiffer." Handbuch Literatur & Ökonomie.(2020) .
Cita MLA (8th ed.)Pfeiffer, Helmut. "Geiz: Helmut Pfeiffer." Handbuch Literatur & Ökonomie.(2020), .
Atenció: Aquestes cites poden no estar 100% correctes.