(2014). Investition: Thema des Heftes. Beton Prisma.
Cita Chicago (17th ed.)"Investition: Thema Des Heftes." Beton Prisma 2014.
Cita MLA (8th ed.)"Investition: Thema Des Heftes." Beton Prisma, 2014.
Atenció: Aquestes cites poden no estar 100% correctes.