Cita APA (7th ed.)
PETR, C., & ENTRIKEN, C. (1995). SERVICE SYSTEM BARRIERS TO REUNIFICATION.
Cita Chicago (17th ed.)
PETR, C.G, i C. ENTRIKEN. SERVICE SYSTEM BARRIERS TO REUNIFICATION. 1995.
Cita MLA (9th ed.)
PETR, C.G, i C. ENTRIKEN. SERVICE SYSTEM BARRIERS TO REUNIFICATION. 1995.
Atenció: Aquestes cites poden no estar 100% correctes.