APA (7 वां संस्करण) प्रशस्ति पत्र

Sölvell, Ö. (1987). Entry barriers and foreign penetration: Emerging patterns of international competition in two electrical engineering industries. Stockholm School of Economics, Institute of International Business.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Sölvell, Örjan. Entry Barriers and Foreign Penetration: Emerging Patterns of International Competition in Two Electrical Engineering Industries. Stockholm: Stockholm School of Economics, Institute of International Business, 1987.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Sölvell, Örjan. Entry Barriers and Foreign Penetration: Emerging Patterns of International Competition in Two Electrical Engineering Industries. Stockholm School of Economics, Institute of International Business, 1987.

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